Class: Activecube::Processor::Table

Inherits:
Object
  • Object
show all
Defined in:
lib/activecube/processor/table.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model) ⇒ Table

Returns a new instance of Table.



6
7
8
 
# File 'lib/activecube/processor/table.rb', line 6

def initialize model
  @model = model
end

Instance Attribute Details

#model ⇒ Object (readonly)

Returns the value of attribute model.



4
5
6
 
# File 'lib/activecube/processor/table.rb', line 4

def model
  @model
end

Instance Method Details

#join(cube_query, left_query, right_query) ⇒ Object 



35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
 
# File 'lib/activecube/processor/table.rb', line 35

def join cube_query, left_query, right_query

  outer_table = model.arel_table.class.new('').project(Arel.star)

  dimension_names = (cube_query.join_fields + cube_query.slices.map{|s| s.key} ).uniq

  query = outer_table.from(left_query).
      join(right_query, ::Arel::Nodes::FullOuterJoin).
      using(*dimension_names)

  cube_query.options.each do |option|
    query = option.append_query model, cube_query, outer_table, query
  end


  query
end

#matches?(query, measures = query.measures) ⇒ Boolean

Returns:

  • (Boolean) 


14
15
16
17
 
# File 'lib/activecube/processor/table.rb', line 14

def matches? query, measures = query.measures
  (query.column_names(measures)-model.attribute_types.keys).empty? &&
      !model.activecube_indexes.detect{|index| !index.matches?(query, measures) }
end

#measures?(measure) ⇒ Boolean

Returns:

  • (Boolean) 


19
20
21
 
# File 'lib/activecube/processor/table.rb', line 19

def measures? measure
  (measure.required_column_names - model.attribute_types.keys).empty?
end

#name ⇒ Object 



10
11
12
 
# File 'lib/activecube/processor/table.rb', line 10

def name
  model.table_name
end

#query(cube_query, measures = cube_query.measures) ⇒ Object 



23
24
25
26
27
28
29
30
31
32
33
 
# File 'lib/activecube/processor/table.rb', line 23

def query cube_query, measures = cube_query.measures

  table = model.arel_table
  query = table

  (cube_query.slices + measures + cube_query.selectors + cube_query.options).each do |s|
    query = s.append_query model, cube_query, table, query
  end

  query
end