Class: PartialKs::Table

Inherits:
Object
  • Object
show all
Defined in:
lib/partial_ks/table.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model) ⇒ Table 



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# File 'lib/partial_ks/table.rb', line 6

def initialize(model)
  @model = model
end

Instance Attribute Details

#model ⇒ Object (readonly)

Returns the value of attribute model.



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# File 'lib/partial_ks/table.rb', line 3

def model
  @model
end

Instance Method Details

#candidate_parent_classes ⇒ Object

NB: can’t do polymorphic for now, rails errors on reflection#klass see, e.g. github.com/rails/rails/issues/15833



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# File 'lib/partial_ks/table.rb', line 22

def candidate_parent_classes
  non_nullable_reflections.reject(&:polymorphic?).map(&:klass)
end

#model? ⇒ Boolean

sometimes the table is present, but the model is not defined e.g. in market specific tables



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# File 'lib/partial_ks/table.rb', line 12

def model?
  model && model.respond_to?(:table_name)
end

#parent_tables ⇒ Object 



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# File 'lib/partial_ks/table.rb', line 26

def parent_tables
  belongs_to_reflections.map(&:table_name)
end

#relation_for_associated_model(klass) ⇒ Object 



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# File 'lib/partial_ks/table.rb', line 30

def relation_for_associated_model(klass)
  association = model.reflect_on_all_associations.find {|assoc| assoc.class_name == klass.name}
  raise "#{filter_condition.name} not found in #{model.name} associations" if association.nil?

  case association.macro
  when :belongs_to
    model.where(association.foreign_key => [0, *klass.pluck(:id)])
  when :has_many
    model.where(model.primary_key => [0, *klass.pluck(association.foreign_key)])
  else
    raise "Unknown macro"
  end
end

#top_level_table? ⇒ Boolean 



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# File 'lib/partial_ks/table.rb', line 16

def top_level_table?
  candidate_parent_classes.empty?
end