method
one?
v5.2.3 -
Show latest stable
- Class:
ActiveRecord::Relation
one?()public
Returns true if there is exactly one record.
- ==
- _exec_scope
- alias_tracker
- any?
- arel_attribute
- blank?
- build
- cache_key
- create
- create!
- delete_all
- destroy_all
- eager_loading?
- empty?
- empty_scope?
- encode_with
- explain
- find_or_create_by
- find_or_create_by!
- find_or_initialize_by
- first_or_create
- first_or_create!
- first_or_initialize
- has_limit_or_offset?
- initialize_copy
- inspect
- joined_includes_values
- load
- many?
- new
- none?
- one?
- pretty_print
- records
- reload
- reset
- scope_for_create
- scoping
- size
- to_a
- to_ary
- to_sql
- update
- update_all
- values
- where_values_hash
- new
-
load_records -
build_preloader - exec_queries
- has_join_values?
- references_eager_loaded_tables?
- skip_query_cache_if_necessary
- tables_in_string
- values_for_create