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.



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# 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.



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

def model
  @model
end

Instance Method Details

#join(cube_query, left_query, right_query) ⇒ Object 



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# File 'lib/activecube/processor/table.rb', line 34

def join cube_query, left_query, right_query

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

  dimension_names = cube_query.join_fields

  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) 


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

def matches? query, measures = query.measures
  (query.column_names(measures)-model.attribute_types.keys).empty?
end

#measures?(measure) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/activecube/processor/table.rb', line 18

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

#name ⇒ Object 



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

def name
  model.table_name
end

#query(cube_query) ⇒ Object 



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# File 'lib/activecube/processor/table.rb', line 22

def query cube_query

  table = model.arel_table
  query = table

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

  query
end