Module | Sequel::Plugins::AutoValidations |
In: |
lib/sequel/plugins/auto_validations.rb
|
The auto_validations plugin automatically sets up the following types of validations for your model columns:
To determine the columns to use for the type/not_null/max_length validations, the plugin looks at the database schema for the model‘s table. To determine the unique validations, Sequel looks at the indexes on the table. In order for this plugin to be fully functional, the underlying database adapter needs to support both schema and index parsing.
This plugin uses the validation_helpers plugin underneath to implement the validations. It does not allow for any per-column validation message customization, but you can alter the messages for the given type of validation on a per-model basis (see the validation_helpers documentation).
You can skip certain types of validations from being automatically added via:
Model.skip_auto_validations(:not_null)
If you want to skip all auto validations (only useful if loading the plugin in a superclass):
Model.skip_auto_validations(:all)
By default, the plugin uses a not_null validation for NOT NULL columns, but that can be changed to a presence validation using an option:
Model.plugin :auto_validations, :not_null=>:presence
This is useful if you want to enforce that NOT NULL string columns do not allow empty values.
Usage:
# Make all model subclass use auto validations (called before loading subclasses) Sequel::Model.plugin :auto_validations # Make the Album class use auto validations Album.plugin :auto_validations
# File lib/sequel/plugins/auto_validations.rb, line 47 47: def self.apply(model, opts=OPTS) 48: model.instance_eval do 49: plugin :validation_helpers 50: @auto_validate_presence = false 51: @auto_validate_not_null_columns = [] 52: @auto_validate_explicit_not_null_columns = [] 53: @auto_validate_max_length_columns = [] 54: @auto_validate_unique_columns = [] 55: @auto_validate_types = true 56: end 57: end
Setup auto validations for the model if it has a dataset.
# File lib/sequel/plugins/auto_validations.rb, line 60 60: def self.configure(model, opts=OPTS) 61: model.instance_eval do 62: setup_auto_validations if @dataset 63: if opts[:not_null] == :presence 64: @auto_validate_presence = true 65: end 66: end 67: end