Class: Headmin::Filter::Field

Inherits:
Base
  • Object
show all
Defined in:
app/models/headmin/filter/field.rb

Constant Summary collapse

OPERATORS = 
%w[eq not_eq matches does_not_match]

Constants inherited from Base

Base::OPERATORS_CONVERT_TO, Base::QUERY_OPERATOR_CONVERT_TO, Base::QUERY_VALUE_CONVERT_TO

Instance Attribute Summary

Attributes inherited from Base

#attribute, #instructions, #raw_value

Instance Method Summary collapse

Methods inherited from Base

#conditionals, #is_i?, #operators, #string, #values

Constructor Details

#initialize(attribute, params, association: nil) ⇒ Field

Returns a new instance of Field.



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# File 'app/models/headmin/filter/field.rb', line 6

def initialize(attribute, params, association: nil)
  @attribute = association ? "#{association}_#{attribute}".to_sym : attribute
  @attribute = "field_#{attribute}".to_sym
  @raw_value = params[@attribute]
  @association = association
  @instructions = []

  if params.key?(@attribute)
    parse(@raw_value)
  end
end

Instance Method Details

#build_query(query, collection, instruction) ⇒ Object 



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# File 'app/models/headmin/filter/field.rb', line 39

def build_query(query, collection, instruction)
  query_operator = convert_to_query_operator(instruction[:operator])
  query_value = convert_to_query_value(instruction[:value], instruction[:operator])

  query_operator, query_value = process_null_operators(query_operator, query_value)

  model = collection.is_a?(Class) ? collection : collection.model

  new_attribute = attribute.to_s.gsub("field_", "").to_sym
  fields_model = model.reflect_on_association(:fields).klass
  new_query = fields_model.arel_table[:name].matches(new_attribute).and(fields_model.arel_table[:value].send(query_operator, query_value))

  query ? query.send(instruction[:conditional], new_query) : new_query
end

#cast_value(value) ⇒ Object 



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# File 'app/models/headmin/filter/field.rb', line 18

def cast_value(value)
  value
end

#display_value(value) ⇒ Object 



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# File 'app/models/headmin/filter/field.rb', line 22

def display_value(value)
  value.downcase
end

#query(collection) ⇒ Object 



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# File 'app/models/headmin/filter/field.rb', line 26

def query(collection)
  return collection unless @instructions.any?

  query = nil

  @instructions.each do |instruction|
    query = build_query(query, collection, instruction)
  end

  collection = collection.joins(:fields)
  collection.where(query)
end