How to index an exisiting code first database?

Question

0.00/5 (No votes)

See more:

, +

I'm using code first for create my database with an ASP.NET MVC project, but I didn't create index for columns. Now I want to index a few columns in my existing database, I can do it from sql server management studio.

I want to ask this, should I make any changes in my models which I created the database, or is it enough to do this operation only on the database?

Thanks a lot.

What I have tried:

I need information about it, I couldn't find good example.

Posted 21-Apr-20 22:34pm

Member 14789376

Updated 22-Apr-20 19:09pm

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

ishan_shah · Answer 1 · 2020-04-22T19:10:00

In the migration, You should add your index creation to the up() method and a drop statement to the Down() method to enable downgrading the database schema

C#

namespace TestLib.Migrations
{
    using System.Data.Entity.Migrations;
 
    public partial class UserTable : DbMigration
    {
        public override void Up()
        {
            CreateIndex("User", new string[] { "UserId", "UserName" },
                true, "IX_User_UserId");
        }
 
        public override void Down()
        {
            DropIndex("User", "IX_User_UserId");
        }
    }
}

Then you should apply the update through the Package Manager Console

F-ES Sitecore · Answer 2 · 2020-04-22T00:22:00

You should add them to your code so they exist if the database is re-made from the code.

Indexes - EF Core | Microsoft Docs[^]

Code first, in general, is a bad idea for anything "serious". It's ok for quick prototyping or getting something started, but not really for any production system.

How to index an exisiting code first database?

2 solutions

Solution 2

Solution 1

Add your solution here

Preview 0