#add_belongs_to |
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#add_check_constraint |
Adds a new check constraint to the table. |
#add_column |
Add a new type column named column_name to table_name . |
#add_foreign_key |
|
#add_index |
Adds a new index to the table. |
#add_reference |
|
#add_timestamps |
Adds timestamps (created_at and updated_at ) columns to table_name . |
#assume_migrated_upto_version,
|
#build_create_table_definition |
Returns a TableDefinition object containing information about the table that would be created if the same arguments were passed to #create_table . |
#change_column |
Changes the columnās definition according to the new options. |
#change_column_comment |
Changes the comment for a column or removes it if nil . |
#change_column_default |
Sets a new default value for a column: |
#change_column_null |
Sets or removes a NOT NULL constraint on a column. |
#change_table |
A block for changing columns in table . |
#change_table_comment |
Changes the comment for a table or removes it if nil . |
#check_constraint_exists? |
Checks to see if a check constraint exists on a table for a given check constraint definition. |
#check_constraints |
Returns an array of check constraints for the given table. |
#column_exists? |
Checks to see if a column exists in a given table. |
#columns |
Returns an array of Column objects for the table specified by table_name . |
#create_join_table |
Creates a new join table with the name created using the lexical order of the first two arguments. |
#create_table |
Creates a new table with the name table_name . |
#data_source_exists? |
Checks to see if the data source name exists on the database. |
#data_sources |
Returns the relation names usable to back Active Record models. |
#drop_join_table |
Drops the join table specified by the given arguments. |
#drop_table |
Drops a table or tables from the database. |
#foreign_key_exists? |
Checks to see if a foreign key exists on a table for a given foreign key definition. |
#foreign_keys |
Returns an array of foreign keys for the given table. |
#index_exists? |
Checks to see if an index exists on a table for a given index definition. |
#index_name_exists? |
Verifies the existence of an index with a given name. |
#indexes |
Returns an array of indexes for the given table. |
#max_index_name_size |
Returns the maximum length of an index name in bytes. |
#native_database_types |
Returns a hash of mappings from the abstract data types to the native database types. |
#options_include_default?,
|
#primary_key |
Returns just a tableās primary key. |
#remove_belongs_to |
|
#remove_check_constraint |
Removes the given check constraint from the table. |
#remove_column |
Removes the column from the table definition. |
#remove_columns |
Removes the given columns from the table definition. |
#remove_foreign_key |
Removes the given foreign key from the table. |
#remove_index |
Removes the given index from the table. |
#remove_reference |
Removes the reference(s). |
#remove_timestamps |
Removes the timestamp columns (created_at and updated_at ) from the table definition. |
#rename_column |
|
#rename_index |
|
#rename_table |
|
#table_alias_for |
Truncates a table alias according to the limits of the current adapter. |
#table_comment |
Returns the table comment thatās stored in database metadata. |
#table_exists? |
Checks to see if the table table_name exists on the database. |
#table_options,
|
#tables |
Returns an array of table names defined in the database. |
#view_exists? |
Checks to see if the view view_name exists on the database. |
#views |
Returns an array of view names defined in the database. |
#add_column_for_alter,
#add_index_sort_order,
|
#add_options_for_index_columns |
Overridden by the MySQL adapter for supporting index lengths and by the PostgreSQL adapter for supporting operator classes. |
#add_timestamps_for_alter,
#can_remove_index_by_name?,
#change_column_default_for_alter,
#check_constraint_for,
#check_constraint_for!,
#check_constraint_name,
#column_options_keys,
#create_alter_table,
#create_table_definition,
#data_source_sql,
|
#expression_column_name? |
Try to identify whether the given column name is an expression. |
#extract_foreign_key_action,
|
#extract_new_comment_value |
|
#extract_new_default_value,
#fetch_type_metadata,
#foreign_key_for,
#foreign_key_for!,
#foreign_key_name,
#generate_index_name,
#index_column_names,
#index_name_for_remove,
#index_name_options,
#insert_versions_sql,
#options_for_index_columns,
#quoted_scope,
#reference_name_for_table,
#remove_column_for_alter,
#remove_columns_for_alter,
#remove_timestamps_for_alter,
#rename_column_indexes,
#rename_column_sql,
#rename_table_indexes,
#strip_table_name_prefix_and_suffix,
#validate_change_column_null_argument!,
#validate_create_table_options!,
#validate_index_length!,
#validate_table_length!,
#add_columns,
#add_index_options,
|
#build_add_column_definition |
Builds an AlterTable object for adding a column to a table. |
#build_change_column_default_definition |
|
#build_create_index_definition |
|
#build_create_join_table_definition |
|
#bulk_change_table,
#check_constraint_options,
|
#columns_for_distinct |
Given a set of columns and an ORDER BY clause, returns the columns for a SELECT DISTINCT. |
#create_schema_dumper,
#distinct_relation_for_primary_key,
#dump_schema_information,
#foreign_key_column_for,
#foreign_key_options,
#index_algorithm,
#index_name,
#internal_string_options_for_primary_key,
#quoted_columns_for_index,
#remove_constraint,
|
#schema_creation |
Returns an instance of SchemaCreation , which can be used to visit a schema definition object and return DDL. |
#type_to_sql,
#update_table_definition,
#valid_column_definition_options,
#valid_primary_key_options,
#valid_table_definition_options
|