Commit 9a2ad60f authored by Robert Speicher's avatar Robert Speicher

Add more highlighting to Migration Style Guide doc

[ci skip]
parent b77969ea
...@@ -60,7 +60,7 @@ migration was tested. ...@@ -60,7 +60,7 @@ migration was tested.
If you need to remove index, please add a condition like in following example: If you need to remove index, please add a condition like in following example:
``` ```ruby
remove_index :namespaces, column: :name if index_exists?(:namespaces, :name) remove_index :namespaces, column: :name if index_exists?(:namespaces, :name)
``` ```
...@@ -75,7 +75,7 @@ need for downtime. To use this method you must disable transactions by calling ...@@ -75,7 +75,7 @@ need for downtime. To use this method you must disable transactions by calling
the method `disable_ddl_transaction!` in the body of your migration class like the method `disable_ddl_transaction!` in the body of your migration class like
so: so:
``` ```ruby
class MyMigration < ActiveRecord::Migration class MyMigration < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers include Gitlab::Database::MigrationHelpers
disable_ddl_transaction! disable_ddl_transaction!
...@@ -96,7 +96,7 @@ the `up` and `down` methods in your migration class. ...@@ -96,7 +96,7 @@ the `up` and `down` methods in your migration class.
For example, to add the column `foo` to the `projects` table with a default For example, to add the column `foo` to the `projects` table with a default
value of `10` you'd write the following: value of `10` you'd write the following:
``` ```ruby
class MyMigration < ActiveRecord::Migration class MyMigration < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers include Gitlab::Database::MigrationHelpers
disable_ddl_transaction! disable_ddl_transaction!
...@@ -125,7 +125,7 @@ set the limit to 8-bytes. This will allow the column to hold a value up to ...@@ -125,7 +125,7 @@ set the limit to 8-bytes. This will allow the column to hold a value up to
Rails migration example: Rails migration example:
``` ```ruby
add_column_with_default(:projects, :foo, :integer, default: 10, limit: 8) add_column_with_default(:projects, :foo, :integer, default: 10, limit: 8)
# or # or
...@@ -145,7 +145,7 @@ Please prefer Arel and plain SQL over usual ActiveRecord syntax. In case of usin ...@@ -145,7 +145,7 @@ Please prefer Arel and plain SQL over usual ActiveRecord syntax. In case of usin
Example with Arel: Example with Arel:
``` ```ruby
users = Arel::Table.new(:users) users = Arel::Table.new(:users)
users.group(users[:user_id]).having(users[:id].count.gt(5)) users.group(users[:user_id]).having(users[:id].count.gt(5))
...@@ -154,7 +154,7 @@ users.group(users[:user_id]).having(users[:id].count.gt(5)) ...@@ -154,7 +154,7 @@ users.group(users[:user_id]).having(users[:id].count.gt(5))
Example with plain SQL and `quote_string` helper: Example with plain SQL and `quote_string` helper:
``` ```ruby
select_all("SELECT name, COUNT(id) as cnt FROM tags GROUP BY name HAVING COUNT(id) > 1").each do |tag| select_all("SELECT name, COUNT(id) as cnt FROM tags GROUP BY name HAVING COUNT(id) > 1").each do |tag|
tag_name = quote_string(tag["name"]) tag_name = quote_string(tag["name"])
duplicate_ids = select_all("SELECT id FROM tags WHERE name = '#{tag_name}'").map{|tag| tag["id"]} duplicate_ids = select_all("SELECT id FROM tags WHERE name = '#{tag_name}'").map{|tag| tag["id"]}
......
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