Class: ActiveRecord::Import::Validator

Inherits:
Object
  • Object
show all
Defined in:
lib/activerecord-import/import.rb

Instance Method Summary collapse

Constructor Details

#initialize(klass, options = {}) ⇒ Validator

Returns a new instance of Validator.



27
28
29
30
 
# File 'lib/activerecord-import/import.rb', line 27

def initialize(klass, options = {})
  @options = options
  init_validations(klass)
end

Instance Method Details

#init_validations(klass) ⇒ Object 



32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
 
# File 'lib/activerecord-import/import.rb', line 32

def init_validations(klass)
  @validate_callbacks = klass._validate_callbacks.dup

  klass._validate_callbacks.each_with_index do |callback, i|
    filter = callback.raw_filter

    if filter.class.name =~ /Validations::PresenceValidator/
      callback = callback.dup
      filter = filter.dup
      associations = klass.reflect_on_all_associations(:belongs_to)
      attrs = filter.instance_variable_get(:@attributes).dup
      associations.each do |assoc|
        if (index = attrs.index(assoc.name))
          key = assoc.foreign_key.to_sym
          attrs[index] = key unless attrs.include?(key)
        end
      end
      filter.instance_variable_set(:@attributes, attrs)
      if @validate_callbacks.respond_to?(:chain, true)
        @validate_callbacks.send(:chain).tap do |chain|
          callback.instance_variable_set(:@filter, filter)
          chain[i] = callback
        end
      else
        callback.raw_filter = filter
        callback.filter = callback.send(:_compile_filter, filter)
        @validate_callbacks[i] = callback
      end
    elsif !@options[:validate_uniqueness] && filter.is_a?(ActiveRecord::Validations::UniquenessValidator)
      @validate_callbacks.delete(callback)
    end
  end
end

#valid_model?(model) ⇒ Boolean

Returns:

  • (Boolean) 


66
67
68
69
70
71
72
73
74
75
76
77
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
 
# File 'lib/activerecord-import/import.rb', line 66

def valid_model?(model)
  validation_context = @options[:validate_with_context]
  validation_context ||= (model.new_record? ? :create : :update)
  current_context = model.send(:validation_context)

  begin
    model.send(:validation_context=, validation_context)
    model.errors.clear

    model.run_callbacks(:validation) do
      if defined?(ActiveSupport::Callbacks::Filters::Environment) # ActiveRecord >= 4.1
        runner = @validate_callbacks.compile
        env = ActiveSupport::Callbacks::Filters::Environment.new(model, false, nil)
        if runner.respond_to?(:call) # ActiveRecord < 5.1
          runner.call(env)
        else # ActiveRecord 5.1
          # Note that this is a gross simplification of ActiveSupport::Callbacks#run_callbacks.
          # It's technically possible for there to exist an "around" callback in the
          # :validate chain, but this would be an aberration, since Rails doesn't define
          # "around_validate". Still, rather than silently ignoring such callbacks, we
          # explicitly raise a RuntimeError, since activerecord-import was asked to perform
          # validations and it's unable to do so.
          #
          # The alternative here would be to copy-and-paste the bulk of the
          # ActiveSupport::Callbacks#run_callbacks method, which is undesirable if there's
          # no real-world use case for it.
          raise "The :validate callback chain contains an 'around' callback, which is unsupported" unless runner.final?
          runner.invoke_before(env)
          runner.invoke_after(env)
        end
      elsif @validate_callbacks.method(:compile).arity == 0 # ActiveRecord = 4.0
        model.instance_eval @validate_callbacks.compile
      else # ActiveRecord 3.x
        model.instance_eval @validate_callbacks.compile(nil, model)
      end
    end

    model.errors.empty?
  ensure
    model.send(:validation_context=, current_context)
  end
end