{"id":92107,"date":"2020-08-23T07:42:16","date_gmt":"2020-08-23T05:42:16","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/etyud-po-realizaczii-row-level-secutity-v-postgresql"},"modified":"2020-08-23T07:42:16","modified_gmt":"2020-08-23T05:42:16","slug":"etyud-po-realizaczii-row-level-secutity-v-postgresql","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/administrirovanie\/etyud-po-realizaczii-row-level-secutity-v-postgresql","title":{"rendered":"Artikull mbi zbatimin e Row Level Security n\u00eb PostgreSQL","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Si nj\u00eb shtes\u00eb p\u00ebr Artikull mbi zbatimin e logjik\u00ebs s\u00eb biznesit n\u00eb nivelin e funksioneve t\u00eb ruajtura PostgreSQL<\/a><\/noindex> dhe pjes\u00ebn kryesore t\u00eb p\u00ebrgjigjes s\u00eb zgjeruar<\/b> n\u00eb koment<\/a><\/noindex>.<\/p>\n

Pjesa teorike \u00ebsht\u00eb p\u00ebrshkruar shk\u00eblqyesh\u00ebm n\u00eb dokumentacion Postgres Pro<\/a><\/noindex> \u2014 Politikat e mbrojtjes s\u00eb rreshtave<\/a><\/noindex>. M\u00eb posht\u00eb \u00ebsht\u00eb shqyrtuar nj\u00eb zbatim praktik t\u00eb nj\u00eb problemi t\u00eb caktuar biznesi \u2014 fshehja e t\u00eb dh\u00ebnave t\u00eb fshira.<\/b> Studimi i kushtohet realizimit modelit t\u00eb rolit duke p\u00ebrdorur RLS<\/a><\/noindex><\/b> \u00ebsht\u00eb paraqitur ve\u00e7mas.<\/p>\n

\"Artikull<\/p>\n

N\u00eb artikull nuk ka asgj\u00eb t\u00eb re, nuk ka kuptim t\u00eb fshehur dhe njohuri sekrete. Vet\u00ebm nj\u00eb skic\u00eb mbi realizimin praktik t\u00eb nj\u00eb ideje teorike. N\u00ebse dikujt i intereson \u2014 lexoni. At\u00ebher\u00eb shihni, mos e humbni koh\u00ebn tuaj kot.<\/p><\/blockquote>\n

<\/a><\/noindex><\/p>\n

Formulimi i detyr\u00ebs<\/h3>\n

\nPa u thelluar shum\u00eb n\u00eb fush\u00ebn temore, shkurt, detyra mund t\u00eb formulohet k\u00ebshtu: kemi nj\u00eb tabel\u00eb q\u00eb realizon nj\u00eb entitet biznesi. Rreshtat n\u00eb tabel\u00eb mund t\u00eb fshihen, por nuk lejohet t\u00eb fshihen fizikisht rreshtat, duhet t'i fshehim ata. <\/p>\n

Sepse \u00ebsht\u00eb th\u00ebn\u00eb \u2014 \"Mos fshij asgj\u00eb, vet\u00ebm riem\u00ebrto. Interneti ruan GJITH\u00c7KA\" <\/b><\/p>\n

<\/i> P\u00ebr m\u00eb tep\u00ebr, \u00ebsht\u00eb gjithashtu e d\u00ebshirueshme t\u00eb mos ri-shkruhen funksionet e ruajtura ekzistuese q\u00eb punojn\u00eb me k\u00ebt\u00eb entitet.<\/p>\n

P\u00ebr t\u00eb realizuar k\u00ebt\u00eb koncept, tabela ka nj\u00eb atribut is_deleted<\/i>. Pastaj gjith\u00e7ka \u00ebsht\u00eb e thjesht\u00eb \u2014 duhet t\u00eb b\u00ebhet n\u00eb m\u00ebnyr\u00eb q\u00eb klienti t\u00eb mund t\u00eb shoh\u00eb vet\u00ebm rreshtat n\u00eb t\u00eb cilat atributi is_deleted<\/i> \u00ebsht\u00eb i pav\u00ebrtet\u00eb. P\u00ebr k\u00ebt\u00eb, p\u00ebrdoret mekanizmi Row Level Security.<\/b><\/p>\n

Implementimi<\/h3>\n

\nKrijojm\u00eb nj\u00eb rol t\u00eb ve\u00e7ant\u00eb dhe nj\u00eb skem\u00eb<\/p>\n

CREATE ROLE repos;\nCREATE SCHEMA repos;<\/code><\/pre>\n
\nKrijojm\u00eb tabel\u00ebn e synuar<\/p>\n
CREATE TABLE repos.file\n(\n...\nis_del BOOLEAN DEFAULT FALSE\n);\nCREATE SCHEMA repos<\/code><\/pre>\n
\nAktivizoni Row Level Security<\/i><\/p>\n
ALTER TABLE repos.file  ENABLE ROW LEVEL SECURITY ;\nCREATE POLICY file_invisible_deleted  ON repos.file FOR ALL TO dba_role USING ( NOT is_deleted );\nGRANT ALL ON TABLE repos.file to dba_role ;\nGRANT USAGE ON SCHEMA repos TO dba_role ;<\/code><\/pre>\n
\nFunksioni sh\u00ebrbimit<\/b> \u2014 fshirja e rreshtit n\u00eb tabel\u00eb<\/p>\n
CREATE OR REPLACE repos.delete( curr_id repos.file.id%TYPE)\nRETURNS integer AS $$\nBEGIN\n...\nUPDATE repos.file\nSET is_del = TRUE \nWHERE id = curr_id ; \n...\nEND\n$$ LANGUAGE plpgsql SECURITY DEFINER;<\/code><\/pre>\n
\nFunksioni biznesor<\/b> \u2014 fshirja e dokumentit<\/p>\n
CREATE OR REPLACE business_functions.deleteDoc( doc_for_delete JSON )\nRETURNS JSON AS $$\nBEGIN\n...\nPERFORM  repos.delete( doc_id ) ;\n...\nEND\n$$ LANGUAGE plpgsql SECURITY DEFINER;<\/code><\/pre>\n
<\/p>\n
Rezultatet<\/h3>\n
\nKlienti fshin dokumentin<\/p>\n
SELECT business_functions.delCFile( (SELECT json_build_object( 'CId', 3 )) );<\/code><\/pre>\n
\nPas fshirjes, klienti i dokumentit nuk e sheh<\/p>\n
SELECT business_functions.getCFile( (SELECT json_build_object( 'CId', 3 )) );\n-----------------\n(0 rows)<\/code><\/pre>\n
\nPor n\u00eb DB dokumenti nuk \u00ebsht\u00eb fshir\u00eb, vet\u00ebm \u00ebsht\u00eb ndryshuar atributi is_del<\/i><\/p>\n
psql -d my_db\nSELECT  id, name , is_del FROM repos.file ;\nid |  name  | is_del\n--+---------+------------\n 1 |  test_1 | t\n(1 row)<\/code><\/pre>\n
\n\u00c7ka k\u00ebrkonte n\u00eb formulimin e detyr\u00ebs. <\/p>\n
P\u00ebrfundimi<\/h2>\n
\nN\u00ebse tema do t\u00eb jet\u00eb interesante, n\u00eb studimin e ardhsh\u00ebm mund t\u00eb tregohet nj\u00eb shembull realizimi t\u00eb modelit t\u00eb rolit t\u00eb ndarjes s\u00eb qasjes n\u00eb t\u00eb dh\u00ebna duke p\u00ebrdorur Row Level Security.
\n
Burimi: habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"
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