Class: Arrest::HasManyCollection

Inherits:
Object
  • Object
show all
Defined in:
lib/arrest/helper/has_many_collection.rb

Overview

< BasicObject

Instance Method Summary collapse

Constructor Details

#initialize(parent, has_many_attribute) ⇒ HasManyCollection

Returns a new instance of HasManyCollection.



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# File 'lib/arrest/helper/has_many_collection.rb', line 4

def initialize(parent, has_many_attribute)
  @parent = parent
  @clazz_name = (StringUtils.classify(has_many_attribute.clazz_name.to_s))
  @url_part = has_many_attribute.url_part
  @children = nil
  @foreign_key_name = (StringUtils.underscore(@parent.class.name).gsub(/^.*\//, '') + '_id').to_sym
  define_filters
  @attribute = has_many_attribute
  @page = 1
  @page_size = nil
  @per_page = 5
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(*args, &block) ⇒ Object 



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# File 'lib/arrest/helper/has_many_collection.rb', line 22

def method_missing(*args, &block)
   children.send(*args, &block)
end

Instance Method Details

#build(attributes = {}) ⇒ Object 



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# File 'lib/arrest/helper/has_many_collection.rb', line 17

def build attributes = {}
  extended_attrs = attributes.merge({@foreign_key_name => @parent.id})
  resolved_class.new(@parent.context, extended_attrs)
end

#current_page ⇒ Object 



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# File 'lib/arrest/helper/has_many_collection.rb', line 67

def current_page
  @page
end

#current_page_count ⇒ Object

:nodoc:



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# File 'lib/arrest/helper/has_many_collection.rb', line 87

def current_page_count #:nodoc:
  @page
end

#first_page? ⇒ Boolean

Returns:



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# File 'lib/arrest/helper/has_many_collection.rb', line 79

def first_page?
  current_page == 1
end

#inspect ⇒ Object 



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# File 'lib/arrest/helper/has_many_collection.rb', line 26

def inspect
  children.inspect
end

#last_page? ⇒ Boolean

Returns:



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# File 'lib/arrest/helper/has_many_collection.rb', line 83

def last_page?
  current_page >= num_pages
end

#limit(count) ⇒ Object 



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# File 'lib/arrest/helper/has_many_collection.rb', line 30

def limit(count)
  if count != @page_size
    @children = nil
  end
  @page_size = count
  self
end

#limit_value ⇒ Object

for kaminari

TODO: move to external module



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# File 'lib/arrest/helper/has_many_collection.rb', line 59

def limit_value #:nodoc:
  @page_size || 0
end

#num_pages ⇒ Object 



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# File 'lib/arrest/helper/has_many_collection.rb', line 71

def num_pages
  if @page_size
    (total_count.to_f / @page_size).ceil
  else
    1
  end
end

#offset(count) ⇒ Object 



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# File 'lib/arrest/helper/has_many_collection.rb', line 38

def offset(count)
  if @page_size
    new_page = count / @page_size
  else
    new_page = 1
  end
  if new_page != @page 
    @children = nil
  end
  @page = new_page
  self
end

#offset_value ⇒ Object

:nodoc:



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# File 'lib/arrest/helper/has_many_collection.rb', line 63

def offset_value #:nodoc:
  ((@page_size || 0) * (@page - 1)) || 0
end

#page(num) ⇒ Object 



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# File 'lib/arrest/helper/has_many_collection.rb', line 96

def page(num)
  num ||= 1
  if @page_size != @per_page || @page != num
    @children = nil
  end
  @page_size = @per_page
  @page = num.to_i
  self
end

#per(num) ⇒ Object 



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# File 'lib/arrest/helper/has_many_collection.rb', line 91

def per(num)
  @per_page = num.to_i
  self
end

#total_count ⇒ Object 



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# File 'lib/arrest/helper/has_many_collection.rb', line 51

def total_count
  children() # make sure request was made before
  @total_count
end