EF Data migrations won't detect changes when adding new migration

Question

I am using Entity Framework 5.0 Data migrations along with code first. When i add a new field to my model and execute the following command in the package manager console.

Answer 1

It happened to me and nothing worked. Then i did this on my own and everything works now.

Problem: I created a Model "Cars". And When I create a migration for it using command "add-migartion AddCarModel", a migratoin was created but it was empty. I tried with different names and also tried delete migration's .cs file but nothing worked. Then I did the following:

Solution: Follow below steps:

1. Delete all the empty migrations that you created for the Model. (But remember the names of the migrations for step 2)

2. Also delete those migration entries from "_MigrationHistory" table.

3. Comment out you line(s) of your model DB context, (in my case it is "public DbSet Cars{ get; set; }")

4. Clean and Rebuild solution. (Its best that if you batch clean)

5. Make sure that your update command is working and not throwing errors. (Command: "update-database -verbose")

6. Now uncomment line(s) that you commented in step 3.

7. Now create the migration for that model. (I created the migration with same name as before)

Hopefully it works. :-)