{"id":2918,"date":"2021-07-21T08:16:50","date_gmt":"2021-07-21T08:16:50","guid":{"rendered":"https:\/\/www.bearloga.space\/?page_id=2918"},"modified":"2021-07-21T08:16:50","modified_gmt":"2021-07-21T08:16:50","slug":"sqlalchemy-orm-primenenie-filtra","status":"publish","type":"page","link":"https:\/\/www.bearloga.space\/en\/sqlalchemy-orm-primenenie-filtra\/","title":{"rendered":"SQLAlchemy ORM \u2014 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u0444\u0438\u043b\u044c\u0442\u0440\u0430"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u0412 \u044d\u0442\u043e\u0439 \u0433\u043b\u0430\u0432\u0435 \u043c\u044b \u043e\u0431\u0441\u0443\u0434\u0438\u043c, \u043a\u0430\u043a \u043f\u0440\u0438\u043c\u0435\u043d\u0438\u0442\u044c \u0444\u0438\u043b\u044c\u0442\u0440, \u0430 \u0442\u0430\u043a\u0436\u0435 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 \u0444\u0438\u043b\u044c\u0442\u0440\u0430 \u0432\u043c\u0435\u0441\u0442\u0435 \u0441 \u0438\u0445 \u043a\u043e\u0434\u0430\u043c\u0438.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Resultset, \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0439 \u043e\u0431\u044a\u0435\u043a\u0442\u043e\u043c Query, \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u043f\u043e\u0434\u0432\u0435\u0440\u0433\u043d\u0443\u0442 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043d\u044b\u043c \u043a\u0440\u0438\u0442\u0435\u0440\u0438\u044f\u043c \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u043c\u0435\u0442\u043e\u0434\u0430 filter ().&nbsp;\u041e\u0431\u0449\u0435\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u043c\u0435\u0442\u043e\u0434\u0430 \u0444\u0438\u043b\u044c\u0442\u0440\u0430 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u0435:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">session.query(class).filter(criteria)<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0412 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u043c \u043f\u0440\u0438\u043c\u0435\u0440\u0435 \u043d\u0430\u0431\u043e\u0440 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u043e\u0432, \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u043d\u044b\u0439 \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u0437\u0430\u043f\u0440\u043e\u0441\u0430 SELECT \u0432 \u0442\u0430\u0431\u043b\u0438\u0446\u0435 \u00ab\u041a\u043b\u0438\u0435\u043d\u0442\u044b\u00bb, \u0444\u0438\u043b\u044c\u0442\u0440\u0443\u0435\u0442\u0441\u044f \u043f\u043e \u0443\u0441\u043b\u043e\u0432\u0438\u044e (ID> 2) \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">result = session.query(Customers).filter(Customers.id&gt;2)<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u042d\u0442\u043e \u0443\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0438\u0435 \u0431\u0443\u0434\u0435\u0442 \u043f\u0435\u0440\u0435\u0432\u043e\u0434\u0438\u0442\u044c\u0441\u044f \u0432 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u0435 \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u0435 SQL \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">SELECT customers.id \nAS customers_id, customers.name \nAS customers_name, customers.address \nAS customers_address, customers.email \nAS customers_email\nFROM customers\nWHERE customers.id &gt; ?<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041f\u043e\u0441\u043a\u043e\u043b\u044c\u043a\u0443 \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0439 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440 (?) \u0417\u0430\u0434\u0430\u043d \u043a\u0430\u043a 2, \u0431\u0443\u0434\u0443\u0442 \u043e\u0442\u043e\u0431\u0440\u0430\u0436\u0430\u0442\u044c\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0442\u0435 \u0441\u0442\u0440\u043e\u043a\u0438 \u0441 \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u043e\u043c \u0441\u0442\u043e\u043b\u0431\u0446\u0430&gt; 2.&nbsp;\u041f\u043e\u043b\u043d\u044b\u0439 \u043a\u043e\u0434 \u043f\u0440\u0438\u0432\u0435\u0434\u0435\u043d \u043d\u0438\u0436\u0435 \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">from sqlalchemy import Column, Integer, String\nfrom sqlalchemy import create_engine\nengine = create_engine('sqlite:\/\/\/sales.db', echo = True)\nfrom sqlalchemy.ext.declarative import declarative_base\nBase = declarative_base()\n\nclass Customers(Base):\n   __tablename__ = 'customers'\n   \n   id = Column(Integer, primary_key = True)\n   name = Column(String)\n\n   address = Column(String)\n   email = Column(String)\n\nfrom sqlalchemy.orm import sessionmaker\nSession = sessionmaker(bind = engine)\nsession = Session()\nresult = session.query(Customers).filter(Customers.id&gt;2)\n\nfor row in result:\n   print (\"ID:\", row.id, \"Name: \",row.name, \"Address:\",row.address, \"Email:\",row.email)<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u0412 \u044d\u0442\u043e\u0439 \u0433\u043b\u0430\u0432\u0435 \u043c\u044b \u043e\u0431\u0441\u0443\u0434\u0438\u043c, \u043a\u0430\u043a \u043f\u0440\u0438\u043c\u0435\u043d\u0438\u0442\u044c \u0444\u0438\u043b\u044c\u0442\u0440, \u0430 \u0442\u0430\u043a\u0436\u0435 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 \u0444\u0438\u043b\u044c\u0442\u0440\u0430 \u0432\u043c\u0435\u0441\u0442\u0435 \u0441 \u0438\u0445 \u043a\u043e\u0434\u0430\u043c\u0438. Resultset, \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0439 \u043e\u0431\u044a\u0435\u043a\u0442\u043e\u043c [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[103],"tags":[],"class_list":["post-2918","page","type-page","status-publish","hentry","category-sqlalchemy"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/pages\/2918","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/comments?post=2918"}],"version-history":[{"count":0,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/pages\/2918\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/media?parent=2918"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/categories?post=2918"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/tags?post=2918"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}