Module Sequel::Plugins::ConstraintValidations
In: lib/sequel/plugins/constraint_validations.rb
lib/sequel/extensions/_model_constraint_validations.rb

The constraint_validations plugin is designed to be used with databases that used the constraint_validations extension when creating their tables. The extension adds validation metadata for constraints created, and this plugin reads that metadata and automatically creates validations for all of the constraints. For example, if you used the extension and created your albums table like this: 

  DB.create_table(:albums) do
    primary_key :id
    String :name
    validate do
      min_length 5, :name
    end
  end

Then when you went to save an album that uses this plugin: 

  Album.create(name: 'abc')
  # raises Sequel::ValidationFailed: name is shorter than 5 characters

Usage: 

  # Make all model subclasses use constraint validations (called before loading subclasses)
  Sequel::Model.plugin :constraint_validations

  # Make the Album class use constraint validations
  Album.plugin :constraint_validations

Methods

apply   configure  

Classes and Modules

Module Sequel::Plugins::ConstraintValidations::ClassMethods
Module Sequel::Plugins::ConstraintValidations::DatabaseMethods
Module Sequel::Plugins::ConstraintValidations::InstanceMethods

Constants

DEFAULT_CONSTRAINT_VALIDATIONS_TABLE = :sequel_constraint_validations   The default constraint validation metadata table name.
OPERATOR_MAP = {:str_lt => :<, :str_lte => :<=, :str_gt => :>, :str_gte => :>=, :int_lt => :<, :int_lte => :<=, :int_gt => :>, :int_gte => :>=}.freeze   Mapping of operator names in table to ruby operators

Public Class methods

apply(model, opts=OPTS)

Automatically load the validation_helpers plugin to run the actual validations.

[Source]

    # File lib/sequel/plugins/constraint_validations.rb, line 41
41:       def self.apply(model, opts=OPTS)
42:         model.instance_exec do
43:           plugin :validation_helpers
44:           @constraint_validations_table = DEFAULT_CONSTRAINT_VALIDATIONS_TABLE
45:           @constraint_validation_options = {}
46:         end
47:       end
configure(model, opts=OPTS)

Parse the constraint validations metadata from the database. Options:

:constraint_validations_table :Override the name of the constraint validations metadata table. Should only be used if the table name was overridden when creating the constraint validations.
:validation_options :Override/augment the options stored in the database with the given options. Keys should be validation type symbols (e.g. :presence) and values should be hashes of options specific to that validation type.

[Source]

    # File lib/sequel/plugins/constraint_validations.rb, line 58
58:       def self.configure(model, opts=OPTS)
59:         model.instance_exec do
60:           if table = opts[:constraint_validations_table]
61:             @constraint_validations_table = table
62:           end
63:           if vos = opts[:validation_options]
64:             vos.each do |k, v|
65:               if existing_options = @constraint_validation_options[k]       
66:                 v = existing_options.merge(v)
67:               end
68:               @constraint_validation_options[k] = v
69:             end
70:           end
71:           parse_constraint_validations
72:         end
73:       end

[Validate]