change migration index length

db/migrate/20230612031416_create_clas.rb

@@ -2,12 +2,14 @@ class CreateClas < ActiveRecord::Migration[5.2]
   def change
     create_table :clas do |t|
       t.string :name, null:false
-      t.string :key, index:true, null:false
+      t.string :key, null:false
       t.text :content
-      t.integer :organization_id, index:true, null:false
+      t.integer :organization_id, null:false
       t.boolean :pr_need, default: false
       t.integer :count, default: 0
       t.timestamps
     end
+    add_index :clas, :key, :length =>190
+    add_index :clas, :organization_id
   end
 end

db/migrate/20230612031448_create_user_clas.rb

@@ -1,12 +1,15 @@
 class CreateUserClas < ActiveRecord::Migration[5.2]
   def change
     create_table :user_clas do |t|
-      t.integer :user_id, null:false, index: true
-      t.integer :cla_id, null:false, index: true
+      t.integer :user_id, null:false
+      t.integer :cla_id, null:false
       t.string :real_name, null:false
       t.string :email, null:false
       t.integer :state, default:0
       t.timestamps
     end
+    add_index :user_clas, :user_id
+    add_index :user_clas, :cla_id
+
   end
 end