Class: Ransack::Context

Inherits:
Object
  • Object
show all
Defined in:
lib/ransack/context.rb,
lib/ransack/adapters/mongoid/ransack/context.rb,
lib/ransack/adapters/active_record/ransack/context.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(object, options = {}) ⇒ Context

<< self


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# File 'lib/ransack/context.rb', line 36

def initialize(object, options = {})
  raise "not implemented"
end

Instance Attribute Details

#arel_visitorObject (readonly)

Returns the value of attribute arel_visitor


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# File 'lib/ransack/context.rb', line 13

def arel_visitor
  @arel_visitor
end

#auth_objectObject

Returns the value of attribute auth_object


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# File 'lib/ransack/context.rb', line 14

def auth_object
  @auth_object
end

#baseObject (readonly)

Returns the value of attribute base


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# File 'lib/ransack/context.rb', line 13

def base
  @base
end

#engineObject (readonly)

Returns the value of attribute engine


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# File 'lib/ransack/context.rb', line 13

def engine
  @engine
end

#klassObject (readonly)

Returns the value of attribute klass


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# File 'lib/ransack/context.rb', line 13

def klass
  @klass
end

#objectObject (readonly)

Returns the value of attribute object


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# File 'lib/ransack/context.rb', line 13

def object
  @object
end

#searchObject (readonly)

Returns the value of attribute search


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# File 'lib/ransack/context.rb', line 13

def search
  @search
end

#search_keyObject

Returns the value of attribute search_key


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# File 'lib/ransack/context.rb', line 14

def search_key
  @search_key
end

Class Method Details

.for(object, options = {}) ⇒ Object


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# File 'lib/ransack/context.rb', line 26

def for(object, options = {})
  context = Class === object ?
    for_class(object, options) :
    for_object(object, options)
  context or raise ArgumentError,
    "Don't know what context to use for #{object}"
end

.for_class(klass, options = {}) ⇒ Object


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# File 'lib/ransack/context.rb', line 18

def for_class(klass, options = {})
  raise "not implemented"
end

.for_object(object, options = {}) ⇒ Object


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# File 'lib/ransack/context.rb', line 22

def for_object(object, options = {})
  raise "not implemented"
end

Instance Method Details

#association_path(str, base = @base) ⇒ Object


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# File 'lib/ransack/context.rb', line 96

def association_path(str, base = @base)
  base = klassify(base)
  str ||= Constants::EMPTY
  path = []
  segments = str.split(/_/)
  association_parts = []
  if (segments = str.split(/_/)).size > 0
    while segments.size > 0 &&
    !base.columns_hash[segments.join(Constants::UNDERSCORE)] &&
    association_parts << segments.shift do
      assoc, klass = unpolymorphize_association(
        association_parts.join(Constants::UNDERSCORE)
        )
      if found_assoc = get_association(assoc, base)
        path += association_parts
        association_parts = []
        base = klassify(klass || found_assoc)
      end
    end
  end

  path.join(Constants::UNDERSCORE)
end

#bind(object, str) ⇒ Object


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# File 'lib/ransack/context.rb', line 64

def bind(object, str)
  object.parent, object.attr_name = @bind_pairs[str]
end

#chain_scope(scope, args) ⇒ Object


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# File 'lib/ransack/context.rb', line 51

def chain_scope(scope, args)
  return unless @klass.method(scope) && args != false
  @object = if scope_arity(scope) < 1 && args == true
              @object.public_send(scope)
            else
              @object.public_send(scope, *args)
            end
end

#contextualize(str) ⇒ Object

Convert a string representing a chain of associations and an attribute into the attribute itself


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# File 'lib/ransack/context.rb', line 46

def contextualize(str)
  parent, attr_name = @bind_pairs[str]
  table_for(parent)[attr_name]
end

#klassify(obj) ⇒ Object


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# File 'lib/ransack/context.rb', line 40

def klassify(obj)
  raise "not implemented"
end

#ransackable_association?(str, klass) ⇒ Boolean


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# File 'lib/ransack/context.rb', line 133

def ransackable_association?(str, klass)
  klass.ransackable_associations(auth_object).include? str
end

#ransackable_attribute?(str, klass) ⇒ Boolean


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# File 'lib/ransack/context.rb', line 128

def ransackable_attribute?(str, klass)
  klass.ransackable_attributes(auth_object).include?(str) ||
  klass.ransortable_attributes(auth_object).include?(str)
end

#ransackable_scope?(str, klass) ⇒ Boolean


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# File 'lib/ransack/context.rb', line 137

def ransackable_scope?(str, klass)
  klass.ransackable_scopes(auth_object).any? { |s| s.to_s == str }
end

#scope_arity(scope) ⇒ Object


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# File 'lib/ransack/context.rb', line 60

def scope_arity(scope)
  @klass.method(scope).arity
end

#searchable_associations(str = Constants::EMPTY) ⇒ Object


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# File 'lib/ransack/context.rb', line 149

def searchable_associations(str = Constants::EMPTY)
  traverse(str).ransackable_associations(auth_object)
end

#searchable_attributes(str = Constants::EMPTY) ⇒ Object


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# File 'lib/ransack/context.rb', line 141

def searchable_attributes(str = Constants::EMPTY)
  traverse(str).ransackable_attributes(auth_object)
end

#sortable_attributes(str = Constants::EMPTY) ⇒ Object


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# File 'lib/ransack/context.rb', line 145

def sortable_attributes(str = Constants::EMPTY)
  traverse(str).ransortable_attributes(auth_object)
end

#traverse(str, base = @base) ⇒ Object


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# File 'lib/ransack/context.rb', line 68

def traverse(str, base = @base)
  str ||= Constants::EMPTY

  if (segments = str.split(/_/)).size > 0
    remainder = []
    found_assoc = nil
    while !found_assoc && segments.size > 0 do
      # Strip the _of_Model_type text from the association name, but hold
      # onto it in klass, for use as the next base
      assoc, klass = unpolymorphize_association(
        segments.join(Constants::UNDERSCORE)
        )
      if found_assoc = get_association(assoc, base)
        base = traverse(
          remainder.join(
            Constants::UNDERSCORE), klass || found_assoc.klass
            )
      end

      remainder.unshift segments.pop
    end
    raise UntraversableAssociationError,
      "No association matches #{str}" unless found_assoc
  end

  klassify(base)
end

#unpolymorphize_association(str) ⇒ Object


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# File 'lib/ransack/context.rb', line 120

def unpolymorphize_association(str)
  if (match = str.match(/_of_([^_]+?)_type$/))
    [match.pre_match, Kernel.const_get(match.captures.first)]
  else
    [str, nil]
  end
end