Class: Filterameter::Helpers::DeclarationWithModel

Inherits:
Object
  • Object
show all
Defined in:
lib/filterameter/helpers/declaration_with_model.rb

Overview

Declaration with Model

Class DeclarationWithModel inspects the declaration under the context of the model. This enables predicate methods as well as drilling through associations.

Instance Method Summary collapse

Constructor Details

#initialize(model, declaration) ⇒ DeclarationWithModel

Returns a new instance of DeclarationWithModel.



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# File 'lib/filterameter/helpers/declaration_with_model.rb', line 10

def initialize(model, declaration)
  @model = model
  @declaration = declaration
end

Instance Method Details

#any_collections? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/filterameter/helpers/declaration_with_model.rb', line 23

def any_collections?
  @declaration.association.reduce(@model) do |related_model, name|
    association = related_model.reflect_on_association(name)
    return true if association.collection?

    association.klass
  end

  false
end

#model_from_association ⇒ Object 



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# File 'lib/filterameter/helpers/declaration_with_model.rb', line 34

def model_from_association
  @declaration.association.flatten.reduce(@model) do |memo, name|
    association = memo.reflect_on_association(name)
    raise_invalid_association if association.nil?

    association.klass
  end
end

#scope? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/filterameter/helpers/declaration_with_model.rb', line 15

def scope?
  model = @declaration.nested? ? model_from_association : @model

  model.respond_to?(@declaration.name) &&
    # checking dangerous_class_method? excludes any names that cannot be scope names, such as "name"
    !model.dangerous_class_method?(@declaration.name)
end