Module: DataMapper::Validate::AutoValidate

Included in:
ClassMethods
Defined in:
lib/dm-validations/auto_validate.rb

Instance Method Summary collapse

Instance Method Details

#auto_generate_validations(property) ⇒ Object

Auto-generate validations for a given property. This will only occur if the option :auto_validation is either true or left undefined.


78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
# File 'lib/dm-validations/auto_validate.rb', line 78

def auto_generate_validations(property)
  property.options[:auto_validation] = true unless property.options.has_key?(:auto_validation)
  return unless property.options[:auto_validation]

  # a serial property is allowed to be nil too, because the
  # value is set by the storage system
  opts = { :allow_nil => property.nullable? || property.serial? }
  opts[:context] = property.options[:validates] if property.options.has_key?(:validates)

  # presence
  unless opts[:allow_nil]
    # validates_present property.name, opts
    validates_present property.name, options_with_message(opts, property, :presence)
  end

  # length
  if property.type == String
    #len = property.length  # XXX: maybe length should always return a Range, with the min defaulting to 1
    len = property.options.fetch(:length, property.options.fetch(:size, DataMapper::Property::DEFAULT_LENGTH))
    if len.is_a?(Range)
      opts[:within] = len
    else
      opts[:maximum] = len
    end
    # validates_length property.name, opts
    validates_length property.name, options_with_message(opts, property, :length)
  end

  # format
  if property.options.has_key?(:format)
    opts[:with] = property.options[:format]
    # validates_format property.name, opts
    validates_format property.name, options_with_message(opts, property, :format)
  end

  # uniqueness validator
  if property.options.has_key?(:unique)
    value = property.options[:unique]
    if value.is_a?(Array) || value.is_a?(Symbol)
      # validates_is_unique property.name, :scope => Array(value)
      validates_is_unique property.name, options_with_message({:scope => Array(value)}, property, :is_unique)
    elsif value.is_a?(TrueClass)
      # validates_is_unique property.name
      validates_is_unique property.name, options_with_message({}, property, :is_unique)
    end
  end

  # within validator
  if property.options.has_key?(:set)
    validates_within property.name, options_with_message({:set => property.options[:set]}, property, :within)
  end

  # numeric validator
  if Integer == property.type
    opts[:integer_only] = true
    # validates_is_number property.name, opts
    validates_is_number property.name, options_with_message(opts, property, :is_number)
  elsif BigDecimal == property.type || Float == property.type
    opts[:precision] = property.precision
    opts[:scale]     = property.scale
    # validates_is_number property.name, opts
    validates_is_number property.name, options_with_message(opts, property, :is_number)
  else
    # We only need this in the case we don't already
    # have a numeric validator, because otherwise
    # it will cause duplicate validation errors
    unless property.custom?
      # validates_is_primitive property.name, opts
      validates_is_primitive property.name, options_with_message(opts, property, :is_primitive)
    end
  end
end

#options_with_message(base_options, property, validator_name) ⇒ Object

adds message for validator


10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
# File 'lib/dm-validations/auto_validate.rb', line 10

def options_with_message(base_options, property, validator_name)
  options = base_options.clone
  opts = property.options
  options[:message] = if opts[:messages]
    if opts[:messages].is_a?(Hash) and msg = opts[:messages][validator_name]
      msg
    else
      nil
    end
  elsif opts[:message]
    opts[:message]
  else
    nil
  end
  options
end