Class: MR::Query

Inherits:
Object
  • Object
show all
Defined in:
lib/mr/query.rb

Direct Known Subclasses

PagedQuery

Defined Under Namespace

Modules: CountRelation

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model_class, relation) ⇒ Query

Returns a new instance of Query.



9
10
11
12
 
# File 'lib/mr/query.rb', line 9

def initialize(model_class, relation)
  @model_class = model_class
  @relation    = relation
end

Instance Attribute Details

#model_class ⇒ Object (readonly)

Returns the value of attribute model_class.



7
8
9
 
# File 'lib/mr/query.rb', line 7

def model_class
  @model_class
end

#relation ⇒ Object (readonly)

Returns the value of attribute relation.



7
8
9
 
# File 'lib/mr/query.rb', line 7

def relation
  @relation
end

Instance Method Details

#count ⇒ Object 



32
33
34
 
# File 'lib/mr/query.rb', line 32

def count
  @count ||= self.count!
end

#count! ⇒ Object 



36
37
38
 
# File 'lib/mr/query.rb', line 36

def count!
  @count = count_relation.count
end

#first ⇒ Object 



22
23
24
 
# File 'lib/mr/query.rb', line 22

def first
  @first ||= self.first!
end

#first! ⇒ Object 



26
27
28
29
30
 
# File 'lib/mr/query.rb', line 26

def first!
  @first = if (record = self.relation.first)
    self.model_class.new(record)
  end
end

#paged(page_num = nil, page_size = nil) ⇒ Object 



40
41
42
 
# File 'lib/mr/query.rb', line 40

def paged(page_num = nil, page_size = nil)
  PagedQuery.new(self, page_num, page_size)
end

#results ⇒ Object 



14
15
16
 
# File 'lib/mr/query.rb', line 14

def results
  @results ||= self.results!
end

#results! ⇒ Object 



18
19
20
 
# File 'lib/mr/query.rb', line 18

def results!
  @results = self.relation.all.map{ |record| self.model_class.new(record) }
end