Entity Framework Code First Fluent Api: Adding Indexes to columns

Question

I\'m running EF 4.2 CF and want to create indexes on certain columns in my POCO objects.

As an example lets say we have this employee class:

public c         


        

Answer 1

expanding on Petoj

i modified the CreateIndexQueryTemplate to

private const string CreateIndexQueryTemplate = "IF NOT EXISTS (SELECT name FROM sysindexes WHERE name = '{indexName}') CREATE {unique} INDEX {indexName} ON {tableName} ({columnName});";

and removed the following from OnModelCreating

Database.SetInitializer(new IndexInitializer<MyContext>());

and added the following to Configuration Seeding method

new IndexInitializer<MyContext>().InitializeDatabase(context);

this way the index attributes are run every time you do a update-database.

Answer 2

Note that in Entity Framework 6.1 (currently in beta) will support the IndexAttribute to annotate the index properties which will automatically result in a (unique) index in your Code First Migrations.

Answer 3

You can specify index in ModelBuilder

modelBuilder
            .Entity<UserSalary>(builder =>
            {
                builder.HasNoKey();
                builder.HasIndex("UserId").IsUnique(false);
                builder.ToTable("UserSalary");
            });