Make schema_dump, query_cache, replica and database_tasks configurable via DATABASE_URL

Fix: rails#50745

I went a bit farther and handled all the boolean configs, not just `schema_cache`.

Co-Authored-By: Mike Coutermarsh <[email protected]>

Author: byroot

activerecord/CHANGELOG.md

@@ -1,3 +1,12 @@
+*   Make `schema_dump`, `query_cache`, `replica` and `database_tasks` configurable via `DATABASE_URL`
+
+    This wouldn't always work previously because boolean values would be interpreted as strings.
+
+    e.g. `DATABASE_URL=postgres://localhost/foo?schema_dump=false` now properly disable dumping the schema
+    cache.
+
+    *Mike Coutermarsh*, *Jean Boussier*
+
 *   Introduce `ActiveRecord::Transactions::ClassMethods#set_callback`
 
      It is identical to `ActiveSupport::Callbacks::ClassMethods#set_callback`

activerecord/lib/active_record/database_configurations/url_config.rb

@@ -41,10 +41,29 @@ def initialize(env_name, name, url, configuration_hash = {})
         super(env_name, name, configuration_hash)
 
         @url = url
-        @configuration_hash = @configuration_hash.merge(build_url_hash).freeze
+        @configuration_hash = @configuration_hash.merge(build_url_hash)
+
+        if @configuration_hash[:schema_dump] == "false"
+          @configuration_hash[:schema_dump] = false
+        end
+
+        if @configuration_hash[:query_cache] == "false"
+          @configuration_hash[:query_cache] = false
+        end
+
+        to_boolean!(@configuration_hash, :replica)
+        to_boolean!(@configuration_hash, :database_tasks)
+
+        @configuration_hash.freeze
       end
 
       private
+        def to_boolean!(configuration_hash, key)
+          if configuration_hash[key].is_a?(String)
+            configuration_hash[key] = configuration_hash[key] != "false"
+          end
+        end
+
         # Return a Hash that can be merged into the main config that represents
         # the passed in url
         def build_url_hash

activerecord/test/cases/database_configurations/url_config_test.rb

@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+require "cases/helper"
+
+module ActiveRecord
+  class DatabaseConfigurations
+    class UrlConfigTest < ActiveRecord::TestCase
+      def test_schema_dump_parsing
+        config = UrlConfig.new("default_env", "primary", "postgres://localhost/foo?schema_dump=false", {})
+        assert_nil config.schema_dump
+
+        config = UrlConfig.new("default_env", "primary", "postgres://localhost/foo?schema_dump=db/foo_schema.rb", {})
+        assert_equal "db/foo_schema.rb", config.schema_dump
+
+        config = UrlConfig.new("default_env", "primary", "postgres://localhost/foo", {})
+        assert_equal "schema.rb", config.schema_dump
+      end
+
+      def test_query_cache_parsing
+        config = UrlConfig.new("default_env", "primary", "postgres://localhost/foo?query_cache=false", {})
+        assert_equal false, config.query_cache
+
+        config = UrlConfig.new("default_env", "primary", "postgres://localhost/foo?query_cache=42", {})
+        assert_equal "42", config.query_cache
+      end
+
+      def test_replica_parsing
+        config = UrlConfig.new("default_env", "primary", "postgres://localhost/foo", {})
+        assert_nil config.replica?
+
+        config = UrlConfig.new("default_env", "primary", "postgres://localhost/foo?replica=true", {})
+        assert_equal true, config.replica?
+
+        config = UrlConfig.new("default_env", "primary", "postgres://localhost/foo?replica=false", {})
+        assert_equal false, config.replica?
+
+        config = UrlConfig.new("default_env", "primary", "postgres://localhost/foo?replica=random", {})
+        assert_equal true, config.replica?
+      end
+
+      def test_database_tasks_parsing
+        config = UrlConfig.new("default_env", "primary", "postgres://localhost/foo", {})
+        assert_equal true, config.database_tasks?
+
+        config = UrlConfig.new("default_env", "primary", "postgres://localhost/foo?database_tasks=random", {})
+        assert_equal true, config.database_tasks?
+
+        config = UrlConfig.new("default_env", "primary", "postgres://localhost/foo?database_tasks=false", {})
+        assert_equal false, config.database_tasks?
+      end
+    end
+  end
+end