orm database

Well, for the friends in the garden. Record the video corresponding to the "ASP. NET MVC using Petapoco Mini ORM Framework +npgsql Drive Connection PostgreSQL database" This blog, because there is no time to record in one months, today I cashed the promise to my friends.This video tutorial directory for video, code, data, wherein the video has 4 paragraphs, the information is my collection of relevant infor

Original: ASP. NET MVC uses Petapoco Mini ORM framework +npgsql to drive connected PostgreSQL database Some time ago in the garden saw the small butterfly Jinghong released about the green version of the linux.net--"Jws.mono". Because I'm right. NET program is very interested in Linux, I also read some information about mono, but there is no time to take time to study this, the Small Butterfly Jing

Dapper is a new ORM tool that has sprung up over the past 2 years, with the flexibility of the ADO-high performance and reflection mapping entities, ideal for programmers who prefer native SQL, and it's very small and lightweight. The purpose of my blog is not to introduce dapper, but to introduce me to the bug and some optimizations I encountered during the process of migrating the database using dapper, d

() = 123 obj.save () # Auto_now only works with updates saved by the Save method Auto_now_add: The first time the data is inserted, the data is automatically added, Auto_now_add and Auto_now are generally used for time operations, such as when the record was created and when it was updated Choices: In-memory with unchanged data to avoid cross-table operations User_type_choices = ( (1," male "), (2," female ") ), (3," shemale ") ) = mod

1, the role of select_related in Dajngo ORM QuerySelect_related () method a one-time database associated objects are queried out into the object, re-query when you do not need to connect to the database, saving the number and time to query the database later. Mainly used for foreign key queries.Blogobj = Blog.objects.f

Tornado 08 Database-orm-sqlalchemy-table relationships and simple login registrationIntroduction#在数据库, The so-called table relationship, is only the human thought of the added table and the relationship between the table, just logically think of the relationship, in fact, the table in the database is not so-called table relationshipOne or one to a table relations

' ) db = sqlalchemy ( app ) fromimport Views, Models This initializes a DB object, and the introduction of Models,models is a descriptive template of the database, which describes 2 Design Database model How to describe this form with flask-sqlalchemy? app/models.py FromAppImportDbclass User(DB.Model):Id=Db.Column(Db.Integer,Primary_key=True)Nickname=Db.Column(Db.String(64),Inde

();//first ()$student = student::where (' id ', ' > ', ten)->orderby (' age ', ' desc ')->first ();} //orm using model queriesPublic function Orm2 () {//Use model to add data$student = new Student ();$student->name = ' Hello ';$student->age = ' Hello ';$bool = $student->save ();Var_dump ($bool);//Formatted date$student = student::find (1);echo Date (' y-m-d h:i:s ', $student->addtime);//Use the model's Create method to add data,$student = student::cr

Recently I'm going to have an automated OPS platform, so I'm looking at Django's knowledge.In the actual project development, encountered a small problem: the front and back end of the data interaction is the main use of JSON. Front-end data to the server side of the simple, slightly troublesome is the server-side transfer JSON to the front-end.First, the data is retrieved from the database, and Django uses the OR