Tutorial by Topics: mapping

public static IEnumerable<TReturn> Query<TFirst, TSecond, TReturn>( this IDbConnection cnn, string sql, Func<TFirst, TSecond, TReturn> map, object param = null, IDbTransaction transaction = null, bool buffered = true, string splitOn = "Id", int? commandTimeout = null, C...

FooModel.objects.filter(field_name__key_name='value to query')

Updating Vim key mappings allows you to solve two kinds of problems: Re-assigning key commands to letters that are more memorable or accessible, and creating key commands for functions which have none. Here you will learn about the various ways to [re]map key commands, and the context to which they...

AnnotationDetails@IdMarks field/column as the key of the entity@BasicMarks requested field to mapped as a basic type. This is applicable to primitive types and their wrappers, String, Date and Calendar. The annotation is actually optional if no parameters are given, but good style would dictate to ...

Lack of an AUTO_INCREMENT id for this table -- The PK given is the 'natural' PK; there is no good reason for a surrogate. MEDIUMINT -- This is a reminder that all INTs should be made as small as is safe (smaller ⇒ faster). Of course the declaration here must match the definition in the tabl...

AnnotationPurpose@TableGeneratorSpecifies generator name and table name where generator can be found@GeneratedValueSpecifies generation strategy and refers to name of generator@OneToOneSpecifies one to one relationship between employee and desk, here Employee is owner of relationmappedByThis elemen...

ColumnColumn@TableGeneratorUses table generator strategy for automatic id creation@GeneratedValueSpecifies that the value applied to fields is a generated value@IdAnnotates the field as identifier@ManyToOneSpecifies Many to One relationship between Employee and Department. This annotation is marked...

A ManyToMany mapping describes a relationship between to entities where both can be related to more than one instance of each other, and is defined by the @ManyToMany annotation. Unlike @OneToMany where a foreign key column in the table of the entity can be used, ManyToMany requires a join table, w...

How to configure your EF model to support entity splitting or table splitting.

This topic discusses how to map one-to-one type relationships using Entity Framework.

The topic discusses how you can map one-to-many and many-to-many relationships using Entity Framework Code First.