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rails generate migration AddRetweetsCountToTweet retweets_count:integer Ok I use above line to create migration file that automatically generates code in the generated file to add a column to a model Tweet with datatype integer. Now I want to add default value to the added column while generating the migration file. Is that possible? I googled it but couldn't find. Guys need help.
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In our case we are going to do second option - create new migration. If we roll back this migration, we need to remove default value from that field using migration and this is how to do it: Schema::table('photos', function (Blueprint $table) { $table->integer('order')->default(NULL)->change(); });
Default migration generator does not handle default values (column modifiers are supported but do not include default or null), but you could create your own generator.
You can also manually update the migration file prior to running rake db:migrate by adding the options to add_column:
add_column :tweet, :retweets_count, :integer, :null => false, :default => 0
... and read Rails API
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t.integer :retweets_count, :default => 0 ... should work.
See the Rails guide on migrations
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