Ätra CRUD izveide ar ligzdu, @nestjsx/crud un TestMace
Å obrÄ«d REST API ir kļuvis par tÄ«mekļa aplikÄciju izstrÄdes standartu, ļaujot izstrÄdi sadalÄ«t neatkarÄ«gÄs daļÄs. UI paÅ”laik tiek izmantoti dažÄdi populÄri ietvari, piemÄram, Angular, React, Vue un citi. AizmugursistÄmas izstrÄdÄtÄji var izvÄlÄties no dažÄdÄm valodÄm un ietvariem. Å odien es gribÄtu runÄt par tÄdu ietvaru kÄ NestJS. Mes esam ieksa TestMace MÄs to aktÄ«vi izmantojam iekÅ”Äjiem projektiem. Izmantojot ligzdu un iepakojumu @nestjsx/crud, izveidosim vienkÄrÅ”u CRUD aplikÄciju.
KÄpÄc NestJS
PÄdÄjÄ laikÄ JavaScript kopienÄ ir parÄdÄ«jies diezgan daudz aizmugursistÄmas ietvaru. Un, ja funkcionalitÄtes ziÅÄ tie nodroÅ”ina lÄ«dzÄ«gas iespÄjas Nest, tad vienÄ lietÄ tas noteikti uzvar ā tÄda ir arhitektÅ«ra. TÄlÄk norÄdÄ«tÄs NestJS funkcijas ļauj izveidot rÅ«pnieciskas lietojumprogrammas un mÄrogot izstrÄdi lielÄm komandÄm:
izmantojot TypeScript kÄ galveno izstrÄdes valodu. Lai gan NestJS atbalsta JavaScript, dažas funkcijas var nedarboties, it Ä«paÅ”i, ja mÄs runÄjam par treÅ”o puÅ”u pakotnÄm;
DI konteinera klÄtbÅ«tne, kas ļauj izveidot brÄ«vi savienotas sastÄvdaļas;
Pati ietvara funkcionalitÄte ir sadalÄ«ta neatkarÄ«gos mainÄmos komponentos. PiemÄram, zem pÄrsega kÄ karkasu to var izmantot kÄ izteiktUn pastiprinÄt, lai strÄdÄtu ar datu bÄzi, Nest out of the box nodroÅ”ina saistÄ«jumus ar tipa vÄtra, mangusts, turpinÄjums;
NestJS ir platformas agnostiÄ·is un atbalsta REST, GraphQL, Websockets, gRPC utt.
Pats ietvars ir iedvesmots no Angular frontend ietvara, un konceptuÄli tam ir daudz kopÄ«ga ar to.
NestJS instalÄÅ”ana un projekta izvietoÅ”ana
Nest satur iepakojumu ligzda/cli, kas ļauj Ätri izvietot pamata lietojumprogrammu sistÄmu. InstalÄsim Å”o pakotni globÄli:
npm install --global @nest/cli
PÄc instalÄÅ”anas mÄs Ä£enerÄsim mÅ«su lietojumprogrammas pamata ietvaru ar nosaukumu nest-rest. Tas tiek darÄ«ts, izmantojot komandu nest new nest-rest.
ligzda jauna ligzda-atpūta
dmitrii@dmitrii-HP-ZBook-17-G3:~/projects $ nest new nest-rest
We will scaffold your app in a few seconds..
CREATE /nest-rest/.prettierrc (51 bytes)
CREATE /nest-rest/README.md (3370 bytes)
CREATE /nest-rest/nest-cli.json (84 bytes)
CREATE /nest-rest/nodemon-debug.json (163 bytes)
CREATE /nest-rest/nodemon.json (67 bytes)
CREATE /nest-rest/package.json (1805 bytes)
CREATE /nest-rest/tsconfig.build.json (97 bytes)
CREATE /nest-rest/tsconfig.json (325 bytes)
CREATE /nest-rest/tslint.json (426 bytes)
CREATE /nest-rest/src/app.controller.spec.ts (617 bytes)
CREATE /nest-rest/src/app.controller.ts (274 bytes)
CREATE /nest-rest/src/app.module.ts (249 bytes)
CREATE /nest-rest/src/app.service.ts (142 bytes)
CREATE /nest-rest/src/main.ts (208 bytes)
CREATE /nest-rest/test/app.e2e-spec.ts (561 bytes)
CREATE /nest-rest/test/jest-e2e.json (183 bytes)
? Which package manager would you ļø to use? yarn
Installation in progress...
Successfully created project nest-rest
Get started with the following commands:
$ cd nest-rest
$ yarn run start
Thanks for installing Nest
Please consider donating to our open collective
to help us maintain this package.
Donate: https://opencollective.com/nest
MÄs izvÄlÄsimies dziju kÄ mÅ«su iepakojuma pÄrvaldnieku.
Å ajÄ brÄ«dÄ« jÅ«s varat startÄt serveri ar komandu npm start un dodos uz adresi http://localhost:3000 jÅ«s varat redzÄt galveno lapu. TaÄu ne jau tÄpÄc esam Å”eit pulcÄjuÅ”ies un ejam tÄlÄk.
Darba iestatÄ«Å”ana ar datu bÄzi
Es izvÄlÄjos PostrgreSQL kÄ DBVS Å”im rakstam. Par gaumÄm nav strÄ«du, manuprÄt, Ŕī ir visnobrieduÅ”ÄkÄ DBVS, kurai ir visas nepiecieÅ”amÄs iespÄjas. KÄ jau minÄts, Nest nodroÅ”ina integrÄciju ar dažÄdÄm pakotnÄm darbam ar datu bÄzÄm. Jo TÄ kÄ mana izvÄle krita uz PostgreSQL, bÅ«tu loÄ£iski izvÄlÄties TypeORM kÄ ORM. InstalÄsim nepiecieÅ”amÄs pakotnes integrÄcijai ar datu bÄzi:
db ir konteiners, kas tieÅ”i satur datu bÄzi. MÅ«su gadÄ«jumÄ tiek izmantota postgresql versija 11.2;
adminer ā datu bÄzes pÄrvaldnieks. NodroÅ”ina tÄ«mekļa saskarni datu bÄzes apskatei un pÄrvaldÄ«bai.
Lai strÄdÄtu ar tcp savienojumiem, es pievienoju Å”Ädu konfigurÄciju.
postgresql.conf
# -----------------------------
# PostgreSQL configuration file
# -----------------------------
#
# This file consists of lines of the form:
#
# name = value
#
# (The "=" is optional.) Whitespace may be used. Comments are introduced with
# "#" anywhere on a line. The complete list of parameter names and allowed
# values can be found in the PostgreSQL documentation.
#
# The commented-out settings shown in this file represent the default values.
# Re-commenting a setting is NOT sufficient to revert it to the default value;
# you need to reload the server.
#
# This file is read on server startup and when the server receives a SIGHUP
# signal. If you edit the file on a running system, you have to SIGHUP the
# server for the changes to take effect, run "pg_ctl reload", or execute
# "SELECT pg_reload_conf()". Some parameters, which are marked below,
# require a server shutdown and restart to take effect.
#
# Any parameter can also be given as a command-line option to the server, e.g.,
# "postgres -c log_connections=on". Some parameters can be changed at run time
# with the "SET" SQL command.
#
# Memory units: kB = kilobytes Time units: ms = milliseconds
# MB = megabytes s = seconds
# GB = gigabytes min = minutes
# TB = terabytes h = hours
# d = days
#------------------------------------------------------------------------------
# FILE LOCATIONS
#------------------------------------------------------------------------------
# The default values of these variables are driven from the -D command-line
# option or PGDATA environment variable, represented here as ConfigDir.
#data_directory = 'ConfigDir' # use data in another directory
# (change requires restart)
#hba_file = 'ConfigDir/pg_hba.conf' # host-based authentication file
# (change requires restart)
#ident_file = 'ConfigDir/pg_ident.conf' # ident configuration file
# (change requires restart)
# If external_pid_file is not explicitly set, no extra PID file is written.
#external_pid_file = '' # write an extra PID file
# (change requires restart)
#------------------------------------------------------------------------------
# CONNECTIONS AND AUTHENTICATION
#------------------------------------------------------------------------------
# - Connection Settings -
listen_addresses = '*'
#listen_addresses = 'localhost' # what IP address(es) to listen on;
# comma-separated list of addresses;
# defaults to 'localhost'; use '*' for all
# (change requires restart)
#port = 5432 # (change requires restart)
#max_connections = 100 # (change requires restart)
#superuser_reserved_connections = 3 # (change requires restart)
#unix_socket_directories = '/tmp' # comma-separated list of directories
# (change requires restart)
#unix_socket_group = '' # (change requires restart)
#unix_socket_permissions = 0777 # begin with 0 to use octal notation
# (change requires restart)
#bonjour = off # advertise server via Bonjour
# (change requires restart)
#bonjour_name = '' # defaults to the computer name
# (change requires restart)
# - TCP Keepalives -
# see "man 7 tcp" for details
#tcp_keepalives_idle = 0 # TCP_KEEPIDLE, in seconds;
# 0 selects the system default
#tcp_keepalives_interval = 0 # TCP_KEEPINTVL, in seconds;
# 0 selects the system default
#tcp_keepalives_count = 0 # TCP_KEEPCNT;
# 0 selects the system default
# - Authentication -
#authentication_timeout = 1min # 1s-600s
#password_encryption = md5 # md5 or scram-sha-256
#db_user_namespace = off
# GSSAPI using Kerberos
#krb_server_keyfile = ''
#krb_caseins_users = off
# - SSL -
#ssl = off
#ssl_ca_file = ''
#ssl_cert_file = 'server.crt'
#ssl_crl_file = ''
#ssl_key_file = 'server.key'
#ssl_ciphers = 'HIGH:MEDIUM:+3DES:!aNULL' # allowed SSL ciphers
#ssl_prefer_server_ciphers = on
#ssl_ecdh_curve = 'prime256v1'
#ssl_min_protocol_version = 'TLSv1'
#ssl_max_protocol_version = ''
#ssl_dh_params_file = ''
#ssl_passphrase_command = ''
#ssl_passphrase_command_supports_reload = off
#------------------------------------------------------------------------------
# RESOURCE USAGE (except WAL)
#------------------------------------------------------------------------------
# - Memory -
#shared_buffers = 32MB # min 128kB
# (change requires restart)
#huge_pages = try # on, off, or try
# (change requires restart)
#temp_buffers = 8MB # min 800kB
#max_prepared_transactions = 0 # zero disables the feature
# (change requires restart)
# Caution: it is not advisable to set max_prepared_transactions nonzero unless
# you actively intend to use prepared transactions.
#work_mem = 4MB # min 64kB
#maintenance_work_mem = 64MB # min 1MB
#autovacuum_work_mem = -1 # min 1MB, or -1 to use maintenance_work_mem
#max_stack_depth = 2MB # min 100kB
#shared_memory_type = mmap # the default is the first option
# supported by the operating system:
# mmap
# sysv
# windows
# (change requires restart)
#dynamic_shared_memory_type = posix # the default is the first option
# supported by the operating system:
# posix
# sysv
# windows
# mmap
# (change requires restart)
# - Disk -
#temp_file_limit = -1 # limits per-process temp file space
# in kB, or -1 for no limit
# - Kernel Resources -
#max_files_per_process = 1000 # min 25
# (change requires restart)
# - Cost-Based Vacuum Delay -
#vacuum_cost_delay = 0 # 0-100 milliseconds (0 disables)
#vacuum_cost_page_hit = 1 # 0-10000 credits
#vacuum_cost_page_miss = 10 # 0-10000 credits
#vacuum_cost_page_dirty = 20 # 0-10000 credits
#vacuum_cost_limit = 200 # 1-10000 credits
# - Background Writer -
#bgwriter_delay = 200ms # 10-10000ms between rounds
#bgwriter_lru_maxpages = 100 # max buffers written/round, 0 disables
#bgwriter_lru_multiplier = 2.0 # 0-10.0 multiplier on buffers scanned/round
#bgwriter_flush_after = 0 # measured in pages, 0 disables
# - Asynchronous Behavior -
#effective_io_concurrency = 1 # 1-1000; 0 disables prefetching
#max_worker_processes = 8 # (change requires restart)
#max_parallel_maintenance_workers = 2 # taken from max_parallel_workers
#max_parallel_workers_per_gather = 2 # taken from max_parallel_workers
#parallel_leader_participation = on
#max_parallel_workers = 8 # maximum number of max_worker_processes that
# can be used in parallel operations
#old_snapshot_threshold = -1 # 1min-60d; -1 disables; 0 is immediate
# (change requires restart)
#backend_flush_after = 0 # measured in pages, 0 disables
#------------------------------------------------------------------------------
# WRITE-AHEAD LOG
#------------------------------------------------------------------------------
# - Settings -
#wal_level = replica # minimal, replica, or logical
# (change requires restart)
#fsync = on # flush data to disk for crash safety
# (turning this off can cause
# unrecoverable data corruption)
#synchronous_commit = on # synchronization level;
# off, local, remote_write, remote_apply, or on
#wal_sync_method = fsync # the default is the first option
# supported by the operating system:
# open_datasync
# fdatasync (default on Linux)
# fsync
# fsync_writethrough
# open_sync
#full_page_writes = on # recover from partial page writes
#wal_compression = off # enable compression of full-page writes
#wal_log_hints = off # also do full page writes of non-critical updates
# (change requires restart)
#wal_buffers = -1 # min 32kB, -1 sets based on shared_buffers
# (change requires restart)
#wal_writer_delay = 200ms # 1-10000 milliseconds
#wal_writer_flush_after = 1MB # measured in pages, 0 disables
#commit_delay = 0 # range 0-100000, in microseconds
#commit_siblings = 5 # range 1-1000
# - Checkpoints -
#checkpoint_timeout = 5min # range 30s-1d
#max_wal_size = 1GB
#min_wal_size = 80MB
#checkpoint_completion_target = 0.5 # checkpoint target duration, 0.0 - 1.0
#checkpoint_flush_after = 0 # measured in pages, 0 disables
#checkpoint_warning = 30s # 0 disables
# - Archiving -
#archive_mode = off # enables archiving; off, on, or always
# (change requires restart)
#archive_command = '' # command to use to archive a logfile segment
# placeholders: %p = path of file to archive
# %f = file name only
# e.g. 'test ! -f /mnt/server/archivedir/%f && cp %p /mnt/server/archivedir/%f'
#archive_timeout = 0 # force a logfile segment switch after this
# number of seconds; 0 disables
# - Archive Recovery -
# These are only used in recovery mode.
#restore_command = '' # command to use to restore an archived logfile segment
# placeholders: %p = path of file to restore
# %f = file name only
# e.g. 'cp /mnt/server/archivedir/%f %p'
# (change requires restart)
#archive_cleanup_command = '' # command to execute at every restartpoint
#recovery_end_command = '' # command to execute at completion of recovery
# - Recovery Target -
# Set these only when performing a targeted recovery.
#recovery_target = '' # 'immediate' to end recovery as soon as a
# consistent state is reached
# (change requires restart)
#recovery_target_name = '' # the named restore point to which recovery will proceed
# (change requires restart)
#recovery_target_time = '' # the time stamp up to which recovery will proceed
# (change requires restart)
#recovery_target_xid = '' # the transaction ID up to which recovery will proceed
# (change requires restart)
#recovery_target_lsn = '' # the WAL LSN up to which recovery will proceed
# (change requires restart)
#recovery_target_inclusive = on # Specifies whether to stop:
# just after the specified recovery target (on)
# just before the recovery target (off)
# (change requires restart)
#recovery_target_timeline = 'latest' # 'current', 'latest', or timeline ID
# (change requires restart)
#recovery_target_action = 'pause' # 'pause', 'promote', 'shutdown'
# (change requires restart)
#------------------------------------------------------------------------------
# REPLICATION
#------------------------------------------------------------------------------
# - Sending Servers -
# Set these on the master and on any standby that will send replication data.
#max_wal_senders = 10 # max number of walsender processes
# (change requires restart)
#wal_keep_segments = 0 # in logfile segments; 0 disables
#wal_sender_timeout = 60s # in milliseconds; 0 disables
#max_replication_slots = 10 # max number of replication slots
# (change requires restart)
#track_commit_timestamp = off # collect timestamp of transaction commit
# (change requires restart)
# - Master Server -
# These settings are ignored on a standby server.
#synchronous_standby_names = '' # standby servers that provide sync rep
# method to choose sync standbys, number of sync standbys,
# and comma-separated list of application_name
# from standby(s); '*' = all
#vacuum_defer_cleanup_age = 0 # number of xacts by which cleanup is delayed
# - Standby Servers -
# These settings are ignored on a master server.
#primary_conninfo = '' # connection string to sending server
# (change requires restart)
#primary_slot_name = '' # replication slot on sending server
# (change requires restart)
#promote_trigger_file = '' # file name whose presence ends recovery
#hot_standby = on # "off" disallows queries during recovery
# (change requires restart)
#max_standby_archive_delay = 30s # max delay before canceling queries
# when reading WAL from archive;
# -1 allows indefinite delay
#max_standby_streaming_delay = 30s # max delay before canceling queries
# when reading streaming WAL;
# -1 allows indefinite delay
#wal_receiver_status_interval = 10s # send replies at least this often
# 0 disables
#hot_standby_feedback = off # send info from standby to prevent
# query conflicts
#wal_receiver_timeout = 60s # time that receiver waits for
# communication from master
# in milliseconds; 0 disables
#wal_retrieve_retry_interval = 5s # time to wait before retrying to
# retrieve WAL after a failed attempt
#recovery_min_apply_delay = 0 # minimum delay for applying changes during recovery
# - Subscribers -
# These settings are ignored on a publisher.
#max_logical_replication_workers = 4 # taken from max_worker_processes
# (change requires restart)
#max_sync_workers_per_subscription = 2 # taken from max_logical_replication_workers
#------------------------------------------------------------------------------
# QUERY TUNING
#------------------------------------------------------------------------------
# - Planner Method Configuration -
#enable_bitmapscan = on
#enable_hashagg = on
#enable_hashjoin = on
#enable_indexscan = on
#enable_indexonlyscan = on
#enable_material = on
#enable_mergejoin = on
#enable_nestloop = on
#enable_parallel_append = on
#enable_seqscan = on
#enable_sort = on
#enable_tidscan = on
#enable_partitionwise_join = off
#enable_partitionwise_aggregate = off
#enable_parallel_hash = on
#enable_partition_pruning = on
# - Planner Cost Constants -
#seq_page_cost = 1.0 # measured on an arbitrary scale
#random_page_cost = 4.0 # same scale as above
#cpu_tuple_cost = 0.01 # same scale as above
#cpu_index_tuple_cost = 0.005 # same scale as above
#cpu_operator_cost = 0.0025 # same scale as above
#parallel_tuple_cost = 0.1 # same scale as above
#parallel_setup_cost = 1000.0 # same scale as above
#jit_above_cost = 100000 # perform JIT compilation if available
# and query more expensive than this;
# -1 disables
#jit_inline_above_cost = 500000 # inline small functions if query is
# more expensive than this; -1 disables
#jit_optimize_above_cost = 500000 # use expensive JIT optimizations if
# query is more expensive than this;
# -1 disables
#min_parallel_table_scan_size = 8MB
#min_parallel_index_scan_size = 512kB
#effective_cache_size = 4GB
# - Genetic Query Optimizer -
#geqo = on
#geqo_threshold = 12
#geqo_effort = 5 # range 1-10
#geqo_pool_size = 0 # selects default based on effort
#geqo_generations = 0 # selects default based on effort
#geqo_selection_bias = 2.0 # range 1.5-2.0
#geqo_seed = 0.0 # range 0.0-1.0
# - Other Planner Options -
#default_statistics_target = 100 # range 1-10000
#constraint_exclusion = partition # on, off, or partition
#cursor_tuple_fraction = 0.1 # range 0.0-1.0
#from_collapse_limit = 8
#join_collapse_limit = 8 # 1 disables collapsing of explicit
# JOIN clauses
#force_parallel_mode = off
#jit = on # allow JIT compilation
#plan_cache_mode = auto # auto, force_generic_plan or
# force_custom_plan
#------------------------------------------------------------------------------
# REPORTING AND LOGGING
#------------------------------------------------------------------------------
# - Where to Log -
#log_destination = 'stderr' # Valid values are combinations of
# stderr, csvlog, syslog, and eventlog,
# depending on platform. csvlog
# requires logging_collector to be on.
# This is used when logging to stderr:
#logging_collector = off # Enable capturing of stderr and csvlog
# into log files. Required to be on for
# csvlogs.
# (change requires restart)
# These are only used if logging_collector is on:
#log_directory = 'log' # directory where log files are written,
# can be absolute or relative to PGDATA
#log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log' # log file name pattern,
# can include strftime() escapes
#log_file_mode = 0600 # creation mode for log files,
# begin with 0 to use octal notation
#log_truncate_on_rotation = off # If on, an existing log file with the
# same name as the new log file will be
# truncated rather than appended to.
# But such truncation only occurs on
# time-driven rotation, not on restarts
# or size-driven rotation. Default is
# off, meaning append to existing files
# in all cases.
#log_rotation_age = 1d # Automatic rotation of logfiles will
# happen after that time. 0 disables.
#log_rotation_size = 10MB # Automatic rotation of logfiles will
# happen after that much log output.
# 0 disables.
# These are relevant when logging to syslog:
#syslog_facility = 'LOCAL0'
#syslog_ident = 'postgres'
#syslog_sequence_numbers = on
#syslog_split_messages = on
# This is only relevant when logging to eventlog (win32):
# (change requires restart)
#event_source = 'PostgreSQL'
# - When to Log -
#log_min_messages = warning # values in order of decreasing detail:
# debug5
# debug4
# debug3
# debug2
# debug1
# info
# notice
# warning
# error
# log
# fatal
# panic
#log_min_error_statement = error # values in order of decreasing detail:
# debug5
# debug4
# debug3
# debug2
# debug1
# info
# notice
# warning
# error
# log
# fatal
# panic (effectively off)
#log_min_duration_statement = -1 # logs statements and their durations
# according to log_statement_sample_rate. -1 is disabled,
# 0 logs all statement, > 0 logs only statements running at
# least this number of milliseconds.
#log_statement_sample_rate = 1 # Fraction of logged statements over
# log_min_duration_statement. 1.0 logs all statements,
# 0 never logs.
# - What to Log -
#debug_print_parse = off
#debug_print_rewritten = off
#debug_print_plan = off
#debug_pretty_print = on
#log_checkpoints = off
#log_connections = off
#log_disconnections = off
#log_duration = off
#log_error_verbosity = default # terse, default, or verbose messages
#log_hostname = off
#log_line_prefix = '%m [%p] ' # special values:
# %a = application name
# %u = user name
# %d = database name
# %r = remote host and port
# %h = remote host
# %p = process ID
# %t = timestamp without milliseconds
# %m = timestamp with milliseconds
# %n = timestamp with milliseconds (as a Unix epoch)
# %i = command tag
# %e = SQL state
# %c = session ID
# %l = session line number
# %s = session start timestamp
# %v = virtual transaction ID
# %x = transaction ID (0 if none)
# %q = stop here in non-session
# processes
# %% = '%'
# e.g. '<%u%%%d> '
#log_lock_waits = off # log lock waits >= deadlock_timeout
#log_statement = 'none' # none, ddl, mod, all
#log_replication_commands = off
#log_temp_files = -1 # log temporary files equal or larger
# than the specified size in kilobytes;
# -1 disables, 0 logs all temp files
#log_timezone = 'GMT'
#------------------------------------------------------------------------------
# PROCESS TITLE
#------------------------------------------------------------------------------
#cluster_name = '' # added to process titles if nonempty
# (change requires restart)
#update_process_title = on
#------------------------------------------------------------------------------
# STATISTICS
#------------------------------------------------------------------------------
# - Query and Index Statistics Collector -
#track_activities = on
#track_counts = on
#track_io_timing = off
#track_functions = none # none, pl, all
#track_activity_query_size = 1024 # (change requires restart)
#stats_temp_directory = 'pg_stat_tmp'
# - Monitoring -
#log_parser_stats = off
#log_planner_stats = off
#log_executor_stats = off
#log_statement_stats = off
#------------------------------------------------------------------------------
# AUTOVACUUM
#------------------------------------------------------------------------------
#autovacuum = on # Enable autovacuum subprocess? 'on'
# requires track_counts to also be on.
#log_autovacuum_min_duration = -1 # -1 disables, 0 logs all actions and
# their durations, > 0 logs only
# actions running at least this number
# of milliseconds.
#autovacuum_max_workers = 3 # max number of autovacuum subprocesses
# (change requires restart)
#autovacuum_naptime = 1min # time between autovacuum runs
#autovacuum_vacuum_threshold = 50 # min number of row updates before
# vacuum
#autovacuum_analyze_threshold = 50 # min number of row updates before
# analyze
#autovacuum_vacuum_scale_factor = 0.2 # fraction of table size before vacuum
#autovacuum_analyze_scale_factor = 0.1 # fraction of table size before analyze
#autovacuum_freeze_max_age = 200000000 # maximum XID age before forced vacuum
# (change requires restart)
#autovacuum_multixact_freeze_max_age = 400000000 # maximum multixact age
# before forced vacuum
# (change requires restart)
#autovacuum_vacuum_cost_delay = 2ms # default vacuum cost delay for
# autovacuum, in milliseconds;
# -1 means use vacuum_cost_delay
#autovacuum_vacuum_cost_limit = -1 # default vacuum cost limit for
# autovacuum, -1 means use
# vacuum_cost_limit
#------------------------------------------------------------------------------
# CLIENT CONNECTION DEFAULTS
#------------------------------------------------------------------------------
# - Statement Behavior -
#client_min_messages = notice # values in order of decreasing detail:
# debug5
# debug4
# debug3
# debug2
# debug1
# log
# notice
# warning
# error
#search_path = '"$user", public' # schema names
#row_security = on
#default_tablespace = '' # a tablespace name, '' uses the default
#temp_tablespaces = '' # a list of tablespace names, '' uses
# only default tablespace
#check_function_bodies = on
#default_transaction_isolation = 'read committed'
#default_transaction_read_only = off
#default_transaction_deferrable = off
#session_replication_role = 'origin'
#statement_timeout = 0 # in milliseconds, 0 is disabled
#lock_timeout = 0 # in milliseconds, 0 is disabled
#idle_in_transaction_session_timeout = 0 # in milliseconds, 0 is disabled
#vacuum_freeze_min_age = 50000000
#vacuum_freeze_table_age = 150000000
#vacuum_multixact_freeze_min_age = 5000000
#vacuum_multixact_freeze_table_age = 150000000
#vacuum_cleanup_index_scale_factor = 0.1 # fraction of total number of tuples
# before index cleanup, 0 always performs
# index cleanup
#bytea_output = 'hex' # hex, escape
#xmlbinary = 'base64'
#xmloption = 'content'
#gin_fuzzy_search_limit = 0
#gin_pending_list_limit = 4MB
# - Locale and Formatting -
#datestyle = 'iso, mdy'
#intervalstyle = 'postgres'
#timezone = 'GMT'
#timezone_abbreviations = 'Default' # Select the set of available time zone
# abbreviations. Currently, there are
# Default
# Australia (historical usage)
# India
# You can create your own file in
# share/timezonesets/.
#extra_float_digits = 1 # min -15, max 3; any value >0 actually
# selects precise output mode
#client_encoding = sql_ascii # actually, defaults to database
# encoding
# These settings are initialized by initdb, but they can be changed.
#lc_messages = 'C' # locale for system error message
# strings
#lc_monetary = 'C' # locale for monetary formatting
#lc_numeric = 'C' # locale for number formatting
#lc_time = 'C' # locale for time formatting
# default configuration for text search
#default_text_search_config = 'pg_catalog.simple'
# - Shared Library Preloading -
#shared_preload_libraries = '' # (change requires restart)
#local_preload_libraries = ''
#session_preload_libraries = ''
#jit_provider = 'llvmjit' # JIT library to use
# - Other Defaults -
#dynamic_library_path = '$libdir'
#------------------------------------------------------------------------------
# LOCK MANAGEMENT
#------------------------------------------------------------------------------
#deadlock_timeout = 1s
#max_locks_per_transaction = 64 # min 10
# (change requires restart)
#max_pred_locks_per_transaction = 64 # min 10
# (change requires restart)
#max_pred_locks_per_relation = -2 # negative values mean
# (max_pred_locks_per_transaction
# / -max_pred_locks_per_relation) - 1
#max_pred_locks_per_page = 2 # min 0
#------------------------------------------------------------------------------
# VERSION AND PLATFORM COMPATIBILITY
#------------------------------------------------------------------------------
# - Previous PostgreSQL Versions -
#array_nulls = on
#backslash_quote = safe_encoding # on, off, or safe_encoding
#escape_string_warning = on
#lo_compat_privileges = off
#operator_precedence_warning = off
#quote_all_identifiers = off
#standard_conforming_strings = on
#synchronize_seqscans = on
# - Other Platforms and Clients -
#transform_null_equals = off
#------------------------------------------------------------------------------
# ERROR HANDLING
#------------------------------------------------------------------------------
#exit_on_error = off # terminate session on any error?
#restart_after_crash = on # reinitialize after backend crash?
#data_sync_retry = off # retry or panic on failure to fsync
# data?
# (change requires restart)
#------------------------------------------------------------------------------
# CONFIG FILE INCLUDES
#------------------------------------------------------------------------------
# These options allow settings to be loaded from files other than the
# default postgresql.conf.
#include_dir = 'conf.d' # include files ending in '.conf' from
# directory 'conf.d'
#include_if_exists = 'exists.conf' # include file only if it exists
#include = 'special.conf' # include file
#------------------------------------------------------------------------------
# CUSTOMIZED OPTIONS
#------------------------------------------------------------------------------
# Add settings for extensions here
Tas arÄ« viss, jÅ«s varat sÄkt konteinerus ar komandu docker-compose up -d. Vai arÄ« atseviÅ”Ä·Ä konsolÄ ar komandu docker-compose up.
TÄtad, pakotnes ir instalÄtas, datubÄze ir palaista, atliek tikai sadraudzÄties savÄ starpÄ. Lai to izdarÄ«tu, projekta saknei jÄpievieno Å”Äds fails: ormconfig.js:
Å Ä« konfigurÄcija tiks izmantota cli tipa formÄ.
ApskatÄ«sim Å”o konfigurÄciju sÄ«kÄk. 3. un 4. rindÄ mÄs iegÅ«stam lietotÄjvÄrdu un paroli no vides mainÄ«gajiem. Tas ir Ärti, ja jums ir vairÄkas vides (izstrÄdÄtÄjs, stadija, prod. utt.). PÄc noklusÄjuma lietotÄjvÄrds ir postgres, un parole ir piemÄrs. PÄrÄjÄ konfigurÄcija ir triviÄla, tÄpÄc mÄs koncentrÄsimies tikai uz interesantÄkajiem parametriem:
sinhronizÄt ā norÄda, vai datu bÄzes shÄma ir automÄtiski jÄizveido, startÄjot lietojumprogrammu. Esiet piesardzÄ«gs ar Å”o opciju un neizmantojiet to ražoÅ”anÄ, pretÄjÄ gadÄ«jumÄ jÅ«s zaudÄsiet datus. Å Ä« opcija ir Ärta, izstrÄdÄjot un atkļūdojot lietojumprogrammu. KÄ alternatÄ«vu Å”ai opcijai varat izmantot komandu schema:sync no CLI TypeORM.
dropSchema ā atiestatiet shÄmu katru reizi, kad tiek izveidots savienojums. TÄpat kÄ iepriekÅ”ÄjÄ, arÄ« Ŕī opcija ir jÄizmanto tikai lietojumprogrammas izstrÄdes un atkļūdoÅ”anas laikÄ.
entÄ«tijas ā kuros ceļos meklÄt modeļu aprakstus. LÅ«dzu, Åemiet vÄrÄ, ka tiek atbalstÄ«ta meklÄÅ”ana pÄc maskas.
cli.entitiesDir ir direktorijs, kurÄ pÄc noklusÄjuma ir jÄsaglabÄ modeļi, kas izveidoti no TypeORM CLI.
Lai mÄs savÄ Nest lietojumprogrammÄ varÄtu izmantot visas TypeORM funkcijas, mums ir jÄimportÄ modulis TypeOrmModule Š² AppModule. Tie. jÅ«su AppModule izskatÄ«sies Å”Ädi:
app.module.ts
import { Module } from '@nestjs/common';
import { AppController } from './app.controller';
import { AppService } from './app.service';
import { TypeOrmModule } from '@nestjs/typeorm';
import * as process from "process";
const username = process.env.POSTGRES_USER || 'postgres';
const password = process.env.POSTGRES_PASSWORD || 'example';
@Module({
imports: [
TypeOrmModule.forRoot({
type: 'postgres',
host: 'localhost',
port: 5432,
username,
password,
database: 'postgres',
entities: [__dirname + '/**/*.entity{.ts,.js}'],
synchronize: true,
}),
],
controllers: [AppController],
providers: [AppService],
})
export class AppModule {}
KÄ jÅ«s, iespÄjams, pamanÄ«jÄt, metode forRoot tiek pÄrsÅ«tÄ«ta tÄda pati konfigurÄcija darbam ar datu bÄzi kÄ failÄ ormconfig.ts
Atliek pÄdÄjais pieskÄriens - pievienojiet vairÄkus uzdevumus darbam ar TypeORM failÄ package.json. Fakts ir tÄds, ka CLI ir rakstÄ«ts JavaScript un darbojas nodejs vidÄ. TomÄr visi mÅ«su modeļi un migrÄcijas tiks rakstÄ«ti maŔīnrakstÄ. TÄpÄc pirms CLI izmantoÅ”anas ir jÄpÄrveido mÅ«su migrÄcijas un modeļi. Å im nolÅ«kam mums ir nepiecieÅ”ama ts-node pakotne:
yarn add -D ts-node
PÄc tam failam package.json pievienojiet nepiecieÅ”amÄs komandas:
"typeorm": "ts-node -r tsconfig-paths/register ./node_modules/typeorm/cli.js",
"migration:generate": "yarn run typeorm migration:generate -n",
"migration:create": "yarn run typeorm migration:create -n",
"migration:run": "yarn run typeorm migration:run"
PirmÄ komanda typeorm pievieno ts-node iesaiÅojumu, lai palaistu TypeORM klip. AtlikuÅ”Äs komandas ir Ärti saÄ«snes, kuras jÅ«s kÄ izstrÄdÄtÄjs izmantosit gandrÄ«z katru dienu: migration:generate ā izveidot migrÄciju, pamatojoties uz izmaiÅÄm jÅ«su modeļos. migration:create ā tukÅ”as migrÄcijas izveidoÅ”ana. migration:run ā migrÄcijas uzsÄkÅ”ana.
Tagad tas ir viss, esam pievienojuÅ”i nepiecieÅ”amÄs pakotnes, konfigurÄjuÅ”i lietojumprogrammu darbam ar datu bÄzi gan no klipa, gan no paÅ”as lietojumprogrammas, kÄ arÄ« palaiduÅ”i DBVS. Ir pienÄcis laiks pievienot loÄ£iku mÅ«su lietojumprogrammai.
PakeÅ”u instalÄÅ”ana CRUD izveidei
Izmantojot tikai Nest, varat izveidot API, kas ļauj izveidot, lasÄ«t, atjauninÄt un dzÄst entÄ«tiju. Å is risinÄjums bÅ«s pÄc iespÄjas elastÄ«gÄks, taÄu dažos gadÄ«jumos tas bÅ«s lieks. PiemÄram, ja jums ir nepiecieÅ”ams Ätri izveidot prototipu, jÅ«s bieži varat upurÄt elastÄ«bu attÄ«stÄ«bas Ätruma dÄļ. Daudzas sistÄmas nodroÅ”ina funkcionalitÄti CRUD Ä£enerÄÅ”anai, aprakstot noteiktas entÄ«tijas datu modeli. Un Nest nav izÅÄmums! Å o funkcionalitÄti nodroÅ”ina pakotne @nestjsx/crud. TÄs iespÄjas ir ļoti interesantas:
vienkÄrÅ”a uzstÄdÄ«Å”ana un konfigurÄÅ”ana;
DBVS neatkarība;
jaudÄ«ga vaicÄjumu valoda ar iespÄju filtrÄt, sakÄrtot lapas, kÄrtot, ielÄdÄt attiecÄ«bas un ligzdotÄs entÄ«tijas, keÅ”atmiÅu utt.;
FunkcionalitÄte ir sadalÄ«ta vairÄkÄs paketÄs:
@nestjsx/crud - pamata komplekts, ko nodroÅ”ina dekorators Crud() marÅ”ruta Ä£enerÄÅ”anai, konfigurÄÅ”anai un apstiprinÄÅ”anai;
@nestjsx/crud-request ā pakotne, kas nodroÅ”ina vaicÄjumu veidotÄju/parsÄtÄju lietoÅ”anai priekÅ”gala pusÄ;
@nestjsx/crud-typeorm ā pakotne integrÄcijai ar TypeORM, kas nodroÅ”ina pamatpakalpojumu TypeOrmCrudService ar CRUD metodÄm darbam ar entÄ«tijÄm datu bÄzÄ.
Å ajÄ apmÄcÄ«bÄ mums bÅ«s nepiecieÅ”ami iepakojumi ligzdajsx/crud un ligzdajsx/crud-typeorm. PirmkÄrt, ievietosim tos
Iepakojumi klase-transformators Šø klases pÄrbaudÄ«tÄjs Å”ajÄ pieteikumÄ ir nepiecieÅ”ami, lai deklaratÄ«vi aprakstÄ«tu modeļu gadÄ«jumu pÄrveidoÅ”anas un ienÄkoÅ”o pieprasÄ«jumu apstiprinÄÅ”anas noteikumus. Å Ä«s pakotnes ir no viena autora, tÄpÄc saskarnes ir lÄ«dzÄ«gas.
TieŔa CRUD ievieŔana
KÄ piemÄru Åemsim lietotÄju sarakstu. LietotÄjiem bÅ«s Å”Ädi lauki: id, username, displayName, email. id - automÄtiskÄs pieauguma lauks, email Šø username - unikÄli lauki. Tas ir vienkÄrÅ”i! Atliek tikai Ä«stenot mÅ«su ideju Nest aplikÄcijas veidÄ.
Vispirms jums ir jÄizveido modulis users, kurÅ” bÅ«s atbildÄ«gs par darbu ar lietotÄjiem. Izmantosim cli no NestJS un izpildÄ«sim komandu mÅ«su projekta saknes direktorijÄ nest g module users.
Å ajÄ modulÄ« mÄs pievienosim entÄ«tiju mapi, kurÄ mums bÅ«s Ŕī moduļa modeļi. KonkrÄti, pievienosim Å”eit failu user.entity.ts ar lietotÄja modeļa aprakstu:
user.entity.ts
import { Column, Entity, PrimaryGeneratedColumn } from 'typeorm';
@Entity()
export class User {
@PrimaryGeneratedColumn()
id: string;
@Column({unique: true})
email: string;
@Column({unique: true})
username: string;
@Column({nullable: true})
displayName: string;
}
Lai Å”o modeli āredzÄtuā mÅ«su lietojumprogramma, tas ir nepiecieÅ”ams modulÄ« UsersModule imports TypeOrmModule Å”Ädu saturu:
users.module.ts
import { Module } from '@nestjs/common';
import { UsersController } from './controllers/users/users.controller';
import { UsersService } from './services/users/users.service';
import { TypeOrmModule } from '@nestjs/typeorm';
import { User } from './entities/user.entity';
@Module({
controllers: [UsersController],
providers: [UsersService],
imports: [
TypeOrmModule.forFeature([User])
]
})
export class UsersModule {}
Tas ir, Å”eit mÄs importÄjam TypeOrmModule, kur kÄ metodes parametrs forFeature MÄs norÄdÄm ar Å”o moduli saistÄ«to modeļu sarakstu.
Atliek tikai izveidot atbilstoÅ”o entÄ«tiju datu bÄzÄ. MigrÄcijas mehÄnisms kalpo Å”iem mÄrÄ·iem. Lai izveidotu migrÄciju, pamatojoties uz izmaiÅÄm modeļos, jums ir jÄpalaiž komanda npm run migration:generate -- CreateUserTable:
Spoilera virsraksts
$ npm run migration:generate -- CreateUserTable
Migration /home/dmitrii/projects/nest-rest/migrations/1563346135367-CreateUserTable.ts has been generated successfully.
Done in 1.96s.
Mums nebija manuÄli jÄraksta migrÄcija, viss notika maÄ£iski. Vai tas nav brÄ«nums! TomÄr tas vÄl nav viss. ApskatÄ«sim izveidoto migrÄcijas failu:
1563346135367-CreateUserTable.ts
import {MigrationInterface, QueryRunner} from "typeorm";
export class CreateUserTable1563346816726 implements MigrationInterface {
public async up(queryRunner: QueryRunner): Promise<any> {
await queryRunner.query(`CREATE TABLE "user" ("id" SERIAL NOT NULL, "email" character varying NOT NULL, "username" character varying NOT NULL, "displayName" character varying, CONSTRAINT "UQ_e12875dfb3b1d92d7d7c5377e22" UNIQUE ("email"), CONSTRAINT "UQ_78a916df40e02a9deb1c4b75edb" UNIQUE ("username"), CONSTRAINT "PK_cace4a159ff9f2512dd42373760" PRIMARY KEY ("id"))`);
}
public async down(queryRunner: QueryRunner): Promise<any> {
await queryRunner.query(`DROP TABLE "user"`);
}
}
KÄ redzat, automÄtiski tika Ä£enerÄta ne tikai migrÄcijas sÄkÅ”anas metode, bet arÄ« tÄs atgrieÅ”anas metode. Fantastiski!
Atliek tikai ieviest Å”o migrÄciju. Tas tiek darÄ«ts ar Å”Ädu komandu:
npm run migration:run.
Tas arÄ« viss, tagad shÄmas izmaiÅas ir migrÄtas uz datu bÄzi.
TÄlÄk mÄs izveidosim pakalpojumu, kas bÅ«s atbildÄ«gs par darbu ar lietotÄjiem un mantosim to no TypeOrmCrudService. MÅ«su gadÄ«jumÄ interesÄjoÅ”Äs entÄ«tijas repozitorijs ir jÄnodod vecÄka konstruktora parametram User krÄtuve.
users.service.ts
import { Injectable } from '@nestjs/common';
import { TypeOrmCrudService } from '@nestjsx/crud-typeorm';
import { User } from '../../entities/user.entity';
import { InjectRepository } from '@nestjs/typeorm';
import { Repository } from 'typeorm';
@Injectable()
export class UsersService extends TypeOrmCrudService<User>{
constructor(@InjectRepository(User) usersRepository: Repository<User>){
super(usersRepository);
}
}
Å is pakalpojums mums bÅ«s nepiecieÅ”ams kontrolierÄ« users. Lai izveidotu kontrolieri, ierakstiet konsolÄ nest g controller users/controllers/users
nest g kontrollera lietotÄji/kontrolleri/lietotÄji
AtvÄrsim Å”o kontrolieri un rediÄ£Äsim to, lai pievienotu nedaudz burvÄ«bas ligzdajsx/crud. Katrai klasei UsersController Pievienosim Å”Ädu dekoratoru:
@Crud({
model: {
type: User
}
})
Crud ir dekorators, kas kontrolierim pievieno nepiecieÅ”amÄs metodes darbam ar modeli. Modeļa tips ir norÄdÄ«ts laukÄ model.type dekoratoru konfigurÄcijas.
Otrais solis ir interfeisa ievieÅ”ana CrudController<User>. āSamontÄtaisā kontrollera kods izskatÄs Å”Ädi:
import { Controller } from '@nestjs/common';
import { Crud, CrudController } from '@nestjsx/crud';
import { User } from '../../entities/user.entity';
import { UsersService } from '../../services/users/users.service';
@Crud({
model: {
type: User
}
})
@Controller('users')
export class UsersController implements CrudController<User>{
constructor(public service: UsersService){}
}
Un viss! Tagad kontrolieris atbalsta visu darbÄ«bu komplektu ar modeli! Netici man? IzmÄÄ£inÄsim mÅ«su lietojumprogrammu darbÄ«bÄ!
VaicÄjuma skripta izveide programmÄ TestMace
Lai pÄrbaudÄ«tu mÅ«su pakalpojumu, mÄs izmantosim IDE darbam ar API TestMace. KÄpÄc TestMace? SalÄ«dzinot ar lÄ«dzÄ«giem produktiem, tam ir Å”Ädas priekÅ”rocÄ«bas:
spÄcÄ«gs darbs ar mainÄ«gajiem. Å obrÄ«d ir vairÄki mainÄ«go veidi, no kuriem katrs spÄlÄ noteiktu lomu: iebÅ«vÄtie mainÄ«gie, dinamiskie mainÄ«gie, vides mainÄ«gie. Katrs mainÄ«gais pieder pie mezgla ar atbalstu mantojuma mehÄnismam;
Viegli izveidojiet skriptus bez programmÄÅ”anas. Tas tiks apspriests turpmÄk;
cilvÄkam lasÄms formÄts, kas ļauj saglabÄt projektu versiju kontroles sistÄmÄs;
API apraksta atbalsts ar iespÄju importÄt no Swagger.
SÄksim savu serveri ar komandu npm start un mÄÄ£iniet piekļūt lietotÄju sarakstam. LietotÄju sarakstu, spriežot pÄc mÅ«su kontrollera konfigurÄcijas, var iegÅ«t no url localhost:3000/users. Iesniegsim pieprasÄ«jumu uz Å”o URL.
PÄc TestMace palaiÅ”anas jÅ«s varat redzÄt Å”Ädu saskarni:
AugÅ”ÄjÄ kreisajÄ stÅ«rÄ« ir projekta koks ar saknes mezglu projekts. MÄÄ£inÄsim izveidot pirmo pieprasÄ«jumu, lai iegÅ«tu lietotÄju sarakstu. Å im nolÅ«kam mÄs izveidosim PieprasÄ«juma darbÄ«ba mezgls Tas tiek darÄ«ts projekta mezgla konteksta izvÄlnÄ Pievienot mezglu -> RequestStep.
URL laukÄ ielÄ«mÄjiet localhost:3000/users un izpildiet pieprasÄ«jumu. MÄs saÅemsim kodu 200 ar tukÅ”u masÄ«vu atbildes pamattekstÄ. Tas ir saprotams, mÄs vÄl nevienu neesam pievienojuÅ”i.
Izveidosim skriptu, kurÄ bÅ«s Å”Ädas darbÄ«bas:
izveidot lietotÄju;
jaunizveidotÄ lietotÄja ID pieprasÄ«jums;
dzÄÅ”ana, izmantojot lietotÄja ID, kas izveidots 1. darbÄ«bÄ.
TÄtad, ejam. ÄrtÄ«bas labad izveidosim tÄdu mezglu kÄ Mape. BÅ«tÄ«bÄ Å”Ä« ir tikai mape, kurÄ mÄs saglabÄsim visu skriptu. Lai izveidotu mapes mezglu, mezgla konteksta izvÄlnÄ atlasiet Projekts Pievienot mezglu -> Mape. Sauksim mezglu pÄrbaudÄ«t-izveidot. Mezgla iekÅ”pusÄ pÄrbaudÄ«t-izveidot Izveidosim savu pirmo pieprasÄ«jumu izveidot lietotÄju. Sauksim jaunizveidoto mezglu izveidot-lietotÄjs. Tas ir, Å”obrÄ«d mezglu hierarhija izskatÄ«sies Å”Ädi:
Dosimies uz atvÄrto cilni izveidot-lietotÄjs mezgls. IevadÄ«sim pieprasÄ«jumam Å”Ädus parametrus:
Pieprasījuma veids - POST
URL ā localhost:3000/lietotÄjiem
Pamatteksts ā JSON ar vÄrtÄ«bu {"email": "[email protected]", "displayName": "New user", "username": "user"}
IzpildÄ«sim Å”o lÅ«gumu. MÅ«su pieteikumÄ teikts, ka ieraksts ir izveidots.
Nu, pÄrbaudÄ«sim Å”o faktu. Lai turpmÄkajÄs darbÄ«bÄs darbotos ar izveidotÄ lietotÄja ID, Å”is parametrs ir jÄsaglabÄ. MehÄnisms tam ir lieliski piemÄrots. dinamiskie mainÄ«gie. Izmantosim mÅ«su piemÄru, lai apskatÄ«tu, kÄ ar tiem strÄdÄt. Atbildes parsÄtajÄ cilnÄ blakus ID mezglam konteksta izvÄlnÄ atlasiet vienumu PieŔķirt mainÄ«gajam. DialoglodziÅÄ jÄiestata Å”Ädi parametri:
mezgls ā kurÄ no senÄiem izveidot dinamisko mainÄ«go. IzvÄlÄsimies pÄrbaudÄ«t-izveidot
MainÄ«gais nosaukums ā Ŕī mainÄ«gÄ lieluma nosaukums. PiezvanÄ«sim userId.
Tagad katru reizi, kad tiek izpildÄ«ts Å”is vaicÄjums, dinamiskÄ mainÄ«gÄ vÄrtÄ«ba tiks atjauninÄta. Un tÄpÄc dinamiskie mainÄ«gie atbalsta hierarhiskÄs mantoÅ”anas mehÄnismu, mainÄ«gais userId bÅ«s pieejams pÄcnÄcÄjiem pÄrbaudÄ«t-izveidot jebkura ligzdoÅ”anas lÄ«meÅa mezgls.
Å is mainÄ«gais mums noderÄs nÄkamajÄ pieprasÄ«jumÄ. Proti, mÄs pieprasÄ«sim jaunizveidoto lietotÄju. KÄ mezgla bÄrns pÄrbaudÄ«t-izveidot mÄs izveidosim pieprasÄ«jumu pÄrbaudi, vai pastÄv ar parametru url vienÄds localhost:3000/users/${$dynamicVar.userId}. SkatÄ«t dizainu ${variable_name} tas iegÅ«st mainÄ«gÄ lieluma vÄrtÄ«bu. Jo Mums ir dinamisks mainÄ«gais, tÄpÄc, lai to iegÅ«tu, jums ir jÄpiekļūst objektam $dynamicVar, t.i., pilnÄ«bÄ piekļūstot dinamiskam mainÄ«gajam userId izskatÄ«sies Å”Ädi ${$dynamicVar.userId}. IzpildÄ«sim pieprasÄ«jumu un pÄrliecinÄsimies, ka dati ir pieprasÄ«ti pareizi.
PÄdÄjÄ darbÄ«ba ir pieprasÄ«t dzÄÅ”anu. Mums tas ir vajadzÄ«gs ne tikai, lai pÄrbaudÄ«tu dzÄÅ”anas darbÄ«bu, bet arÄ«, tÄ teikt, lai sakoptos pÄc sevis datubÄzÄ, jo E-pasta un lietotÄjvÄrda lauki ir unikÄli. TÄtad, pÄrbaudes izveides mezglÄ mÄs izveidosim lietotÄja dzÄÅ”anas pieprasÄ«jumu ar Å”Ädiem parametriem
Tagad mÄs varam palaist visu Å”o skriptu jebkurÄ laikÄ. Lai palaistu skriptu, konteksta izvÄlnÄ ir jÄizvÄlas pÄrbaudÄ«t-izveidot mezgla vienums skrÄjiens.
Skripta mezgli tiks izpildÄ«ti viens pÄc otra
Å o skriptu var saglabÄt savÄ projektÄ, palaižot Fails -> SaglabÄt projektu.
SecinÄjums
Visas izmantoto rÄ«ku funkcijas vienkÄrÅ”i nevarÄja iekļauties Ŕī raksta formÄtÄ. Kas attiecas uz galveno vaininieku - paku ligzdajsx/crud ā Å”Ädas tÄmas paliek atklÄtas:
modeļu validÄcija un transformÄcija pÄc pasÅ«tÄ«juma;
jaudÄ«ga vaicÄjumu valoda un Ärta tÄs lietoÅ”ana priekÅ”pusÄ;
pÄrdefinÄt un pievienot jaunas metodes rupjiem kontrolieriem;
swagger atbalsts;
keÅ”atmiÅas pÄrvaldÄ«ba.
TomÄr pietiek ar to, kas aprakstÄ«ts rakstÄ, lai saprastu, ka pat tÄdam uzÅÄmuma ietvaram kÄ NestJS ir rÄ«ki Ätrai lietojumprogrammu prototipÄÅ”anai. Un tik forÅ”s IDE patÄ«k TestMace ļauj uzturÄt noteiktu tempu.