WIP

migrations/lib/database/schema/config_validator.rb

@@ -71,6 +71,7 @@ module Migrations::Database::Schema
       schema_config = config[:schema]
       validate_excluded_tables(schema_config)
       validate_tables(schema_config)
+      validate_columns(schema_config)
     end
 
     def validate_excluded_tables(schema_config)
@@ -105,6 +106,18 @@ module Migrations::Database::Schema
       end
     end
 
+    def validate_columns(schema_config)
+      schema_config[:tables].each_pair do |table_name, columns|
+        existing_columns = @db.columns(table_name)
+
+        if (added_columns = columns["add"])
+        end
+
+        modified_columns = columns["modify"] || []
+        excluded_columns = columns["exclude"] || []
+      end
+    end
+
     def validate_plugins(config)
       plugin_names = config[:plugins]
       all_plugin_names = Discourse.plugins.map(&:name)

migrations/spec/lib/database/schema/loader_spec.rb

@@ -0,0 +1 @@
+# frozen_string_literal: true

migrations/spec/lib/database/schema/model_writer_spec.rb

@@ -0,0 +1 @@
+# frozen_string_literal: true

migrations/spec/lib/database/schema/table_writer_spec.rb

@@ -0,0 +1 @@
+# frozen_string_literal: true