Module: MotionDataWrapper::Relation::FinderMethods

Included in:
MotionDataWrapper::Relation
Defined in:
lib/motion_data_wrapper/relation/finder_methods.rb

Instance Method Summary collapse

Instance Method Details

#all ⇒ Object 



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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 5

def all
  to_a
end

#count ⇒ Object 



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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 9

def count
  return to_a.count if fetchOffset > 0
  old_result_type = self.resultType
  self.resultType = NSCountResultType
  count = to_a[0]
  self.resultType = old_result_type
  return count
end

#destroy_all ⇒ Object 



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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 18

def destroy_all
  all.map &:destroy
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 22

def empty?
  self.count == 0
end

#except(query_part) ⇒ Object 



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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 26

def except(query_part)
  case query_part.to_sym
   when :where
     self.predicate = nil
   when :order
     self.sortDescriptors = nil
   when :limit
     self.fetchLimit = 0
   else
     raise ArgumentError, "unsupport query part '#{query_part}'"
   end
   self
end

#exists? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 40

def exists?
  !empty?
end

#first ⇒ Object 



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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 44

def first
  take
end

#first! ⇒ Object 



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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 48

def first!
  take!
end

#last ⇒ Object 



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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 52

def last
  self.fetchOffset = self.count - 1 unless self.count < 1
  take
end

#last! ⇒ Object 



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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 57

def last!
  last or raise RecordNotFound
end

#limit(l) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 61

def limit(l)
  l = l.to_i
  raise ArgumentError, "limit '#{l}' cannot be less than zero. Use zero for no limit." if l < 0
  self.fetchLimit = l
  self
end

#offset(o) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 68

def offset(o)
  o = o.to_i
  raise ArgumentError, "offset '#{o}' cannot be less than zero." if o < 0
  self.fetchOffset = o
  self
end

#order(column, opts = {}) ⇒ Object 



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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 75

def order(column, opts={})
  descriptors = sortDescriptors.nil? ? [] : sortDescriptors.mutableCopy
  descriptors << NSSortDescriptor.sortDescriptorWithKey(column.to_s, ascending:opts.fetch(:ascending, true))
  self.sortDescriptors = descriptors
  self
end

#pluck(column) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 82

def pluck(column)
  self.resultType = NSDictionaryResultType

   attribute_description = entity.attributesByName[column]
   raise ArgumentError, "#{column} not a valid column name" if attribute_description.nil?

   self.propertiesToFetch = [attribute_description]
   to_a.collect { |r| r[column] }
end

#take ⇒ Object 



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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 92

def take
  limit(1).to_a[0]
end

#take! ⇒ Object 



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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 96

def take!
  take or raise RecordNotFound
end

#uniq ⇒ Object 



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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 100

def uniq
  self.returnsDistinctResults = true
  self
end

#where(format, *args) ⇒ Object 



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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 105

def where(format, *args)
  new_predicate = NSPredicate.predicateWithFormat(format.gsub("?", "%@"), argumentArray:args)

  if self.predicate
    self.predicate = NSCompoundPredicate.andPredicateWithSubpredicates([predicate, new_predicate])
  else
    self.predicate = new_predicate
  end

  self
end

#with_context(ctx) ⇒ Object 



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# File 'lib/motion_data_wrapper/relation/finder_methods.rb', line 117

def with_context(ctx)
  @ctx = ctx
  self
end