Create operations_strategies and operations_scopes tables

For use with operations feature flags

changelogs/unreleased/feature-flag-strategy-scope-tables.yml

+---
+title: Create operations strategies and scopes tables
+merge_request: 24819
+author:
+type: added

db/migrate/20200210184410_create_operations_strategies_table.rb

+# frozen_string_literal: true
+
+class CreateOperationsStrategiesTable < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  def change
+    create_table :operations_strategies do |t|
+      t.references :feature_flag, index: true, null: false, foreign_key: { to_table: :operations_feature_flags, on_delete: :cascade }
+      t.string :name, null: false, limit: 255
+      t.jsonb :parameters, null: false, default: {}
+    end
+  end
+end

db/migrate/20200210184420_create_operations_scopes_table.rb

+# frozen_string_literal: true
+
+class CreateOperationsScopesTable < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  def change
+    create_table :operations_scopes do |t|
+      t.references :strategy, null: false, index: false, foreign_key: { to_table: :operations_strategies, on_delete: :cascade }
+      t.string :environment_scope, null: false, limit: 255
+    end
+
+    add_index :operations_scopes, [:strategy_id, :environment_scope], unique: true
+  end
+end

db/schema.rb

@@ -2934,6 +2934,19 @@ ActiveRecord::Schema.define(version: 2020_02_12_052620) do
     t.index ["project_id", "token_encrypted"], name: "index_feature_flags_clients_on_project_id_and_token_encrypted", unique: true
   end
 
+  create_table "operations_scopes", force: :cascade do |t|
+    t.bigint "strategy_id", null: false
+    t.string "environment_scope", limit: 255, null: false
+    t.index ["strategy_id", "environment_scope"], name: "index_operations_scopes_on_strategy_id_and_environment_scope", unique: true
+  end
+
+  create_table "operations_strategies", force: :cascade do |t|
+    t.bigint "feature_flag_id", null: false
+    t.string "name", limit: 255, null: false
+    t.jsonb "parameters", default: {}, null: false
+    t.index ["feature_flag_id"], name: "index_operations_strategies_on_feature_flag_id"
+  end
+
   create_table "packages_build_infos", force: :cascade do |t|
     t.integer "package_id", null: false
     t.integer "pipeline_id"
@@ -4867,6 +4880,8 @@ ActiveRecord::Schema.define(version: 2020_02_12_052620) do
   add_foreign_key "operations_feature_flag_scopes", "operations_feature_flags", column: "feature_flag_id", on_delete: :cascade
   add_foreign_key "operations_feature_flags", "projects", on_delete: :cascade
   add_foreign_key "operations_feature_flags_clients", "projects", on_delete: :cascade
+  add_foreign_key "operations_scopes", "operations_strategies", column: "strategy_id", on_delete: :cascade
+  add_foreign_key "operations_strategies", "operations_feature_flags", column: "feature_flag_id", on_delete: :cascade
   add_foreign_key "packages_build_infos", "ci_pipelines", column: "pipeline_id", on_delete: :nullify
   add_foreign_key "packages_build_infos", "packages_packages", column: "package_id", on_delete: :cascade
   add_foreign_key "packages_conan_file_metadata", "packages_package_files", column: "package_file_id", on_delete: :cascade