mathew4509
How to delete/drop table?
This is my migration. And it is one of the tables in my database. I no longer need this table. Can I know what is the command I use to remove this table? or can I know where I can find commands to delete/remove migrations?
defmodule Blogs.Repo.Migrations.CreatePosts do
use Ecto.Migration
def change do
create table(:posts) do
add :title, :string, null: false
add :slug, :string, null: false
add :body, :string, null: false
timestamps()
end
create unique_index(:posts, [:title])
create unique_index(:posts, [:slug])
end
end
Thanks 
Marked As Solved
KiKi
No, you have to create a new migration, I named it DropPosts here but you can use any name you like.
To generate migration type the following command in terminal. More about it here mix ecto.gen.migration — Ecto SQL v3.14.0
mix ecto.gen.migration drop_posts
And then add change function to the migration file
defmodule Blogs.Repo.Migrations.DropPosts do
use Ecto.Migration
def change do
drop table("posts")
end
end
Also Liked
benwilson512
As a minor note, dropping the indexes is unnecessary, they will be removed when the table they are built for is deleted.
KiKi
drop table("posts")
drop index("posts", [:title])
drop index("posts", [:slug])
APB9785
You’ll need to make a new migration file with a different name, and you can use the same format as you posted in the OP. Then run it with mix ecto.migrate
More details at Ecto.Migration
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