Commit 35a3e918 authored by Nick Thomas's avatar Nick Thomas

Make the index on environment name and project id unique, fixing up any duplicates

parent 2d1dfae9
class FixupEnvironmentNameUniqueness < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
DOWNTIME = true
DOWNTIME_REASON = 'Renaming non-unique environments'
def up
environments = Arel::Table.new(:environments)
# Get all [project_id, name] pairs that occur more than once
finder_sql = environments.
group(environments[:project_id], environments[:name]).
having(Arel.sql("COUNT(1)").gt(1)).
project(environments[:project_id], environments[:name]).
to_sql
conflicting = connection.exec_query(finder_sql)
conflicting.rows.each do |project_id, name|
fix_duplicates(project_id, name)
end
end
def down
# Nothing to do
end
# Rename conflicting environments by appending "-#{id}" to all but the first
def fix_duplicates(project_id, name)
environments = Arel::Table.new(:environments)
finder_sql = environments.
where(environments[:project_id].eq(project_id)).
where(environments[:name].eq(name)).
order(environments[:id].asc).
project(environments[:id], environments[:name]).
to_sql
# Now we have the data for all the conflicting rows
conflicts = connection.exec_query(finder_sql).rows
conflicts.shift # Leave the first row alone
conflicts.each do |id, name|
update_sql =
Arel::UpdateManager.new(ActiveRecord::Base).
table(environments).
set(environments[:name] => name + "-" + id.to_s).
where(environments[:id].eq(id)).
to_sql
connection.exec_update(update_sql, self.class.name, [])
end
end
end
class CreateEnvironmentNameUniqueIndex < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
disable_ddl_transaction!
DOWNTIME = true
DOWNTIME_REASON = 'Making a non-unique index into a unique index'
def up
remove_index :environments, [:project_id, :name]
add_concurrent_index :environments, [:project_id, :name], unique: true
end
def down
remove_index :environments, [:project_id, :name], unique: true
add_concurrent_index :environments, [:project_id, :name]
end
end
......@@ -11,7 +11,7 @@
#
# It's strongly recommended that you check this file into your version control system.
ActiveRecord::Schema.define(version: 20161212142807) do
ActiveRecord::Schema.define(version: 20161207231621) do
# These are extensions that must be enabled in order to support this database
enable_extension "plpgsql"
......@@ -430,7 +430,7 @@ ActiveRecord::Schema.define(version: 20161212142807) do
t.string "state", default: "available", null: false
end
add_index "environments", ["project_id", "name"], name: "index_environments_on_project_id_and_name", using: :btree
add_index "environments", ["project_id", "name"], name: "index_environments_on_project_id_and_name", unique: true, using: :btree
create_table "events", force: :cascade do |t|
t.string "target_type"
......
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