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-rw-r--r--activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb15
1 files changed, 13 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
index 8ba9943f75..7041d92586 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
@@ -1185,12 +1185,22 @@ module ActiveRecord
end
# Changes the comment for a table or removes it if +nil+.
- def change_table_comment(table_name, comment)
+ #
+ # Passing a hash containing +:from+ and +:to+ will make this change
+ # reversible in migration:
+ #
+ # change_table_comment(:posts, from: "old_comment", to: "new_comment")
+ def change_table_comment(table_name, comment_or_changes)
raise NotImplementedError, "#{self.class} does not support changing table comments"
end
# Changes the comment for a column or removes it if +nil+.
- def change_column_comment(table_name, column_name, comment)
+ #
+ # Passing a hash containing +:from+ and +:to+ will make this change
+ # reversible in migration:
+ #
+ # change_column_comment(:posts, :state, from: "old_comment", to: "new_comment")
+ def change_column_comment(table_name, column_name, comment_or_changes)
raise NotImplementedError, "#{self.class} does not support changing column comments"
end
@@ -1374,6 +1384,7 @@ module ActiveRecord
default_or_changes
end
end
+ alias :extract_new_comment_value :extract_new_default_value
def can_remove_index_by_name?(options)
options.is_a?(Hash) && options.key?(:name) && options.except(:name, :algorithm).empty?