Class: Namo::Collection

Inherits:
Namo
  • Object
show all
Defined in:
lib/Namo/Collection.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#members ⇒ Object (readonly)

Returns the value of attribute members.



6
7
8
 
# File 'lib/Namo/Collection.rb', line 6

def members
  @members
end

Instance Method Details

#<<(*constituents) ⇒ Object 



8
9
10
11
12
13
14
15
16
17
18
19
20
 
# File 'lib/Namo/Collection.rb', line 8

def <<(*constituents)
  constituents.flatten.each do |constituent|
    case constituent
    when Namo then add_member(constituent)
    when Module then attach(constituent)
    when Hash, Row
      raise ArgumentError, "a Collection's rows come from its members; add a member (a named Namo), not a loose row"
    else raise TypeError, "can't append #{constituent.class} to a Collection"
    end
  end
  @data = detail.data
  self
end

#as_detail(by = :member) ⇒ Object 



45
46
47
48
 
# File 'lib/Namo/Collection.rb', line 45

def as_detail(by = :member)
  @data = detail(by: by).data
  self
end

#as_summary(dimension, by: :member, reducer: :sum) ⇒ Object 



40
41
42
43
 
# File 'lib/Namo/Collection.rb', line 40

def as_summary(dimension, by: :member, reducer: :sum)
  @data = summary(dimension, by: by, reducer: reducer).data
  self
end

#detail(by: :member) ⇒ Object 



33
34
35
36
37
38
 
# File 'lib/Namo/Collection.rb', line 33

def detail(by: :member)
  rows = @members.flat_map do |member|
    member.data.map{|row| row.key?(by) ? row : row.merge(by => member.name)}
  end
  Namo.new(rows)
end

#find(name) ⇒ Object 



22
23
24
 
# File 'lib/Namo/Collection.rb', line 22

def find(name)
  @members.find{|member| member.name == name} unless name.nil?
end

#summary(dimension, by: :member, reducer: :sum) ⇒ Object 



26
27
28
29
30
31
 
# File 'lib/Namo/Collection.rb', line 26

def summary(dimension, by: :member, reducer: :sum)
  rows = @members.map do |member|
    {by => member.name, dimension => member.values(dimension).send(reducer)}
  end
  Namo.new(rows)
end