Class: CQL::Query

Inherits:
Object
  • Object
show all
Includes:
Dsl
Defined in:
lib/cql/query.rb

Overview

Not a part of the public API. Subject to change at any time.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Dsl

#as, #eq, #from, #gt, #gte, #lc, #line, #lt, #lte, #method_missing, #name, #sc, #select, #soc, #ssoc, #tags, #tc, #transform, #with, #without

Constructor Details

#initialize(directory, &block) ⇒ Query

Creates a new query object

Raises:

  • (ArgumentError) 


14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
 
# File 'lib/cql/query.rb', line 14

def initialize(directory, &block)
  # Set root object
  @data = directory

  # Populate configurables from DSL block
  self.instance_eval(&block)


  raise(ArgumentError, "A query must specify a 'select' clause") unless @what
  raise(ArgumentError, "A query must specify a 'from' clause") unless @from

  warn("Multiple selections made without using an 'as' clause") unless @name_transforms || (@what.count == @what.uniq.count)

  # Gather relevant objects from root object and filters
  @data = CQL::MapReduce.gather_objects(@data, @from, @filters)

  # Extract properties from gathered objects
  @data = format_output(@data)
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class CQL::Dsl

Instance Attribute Details

#data ⇒ Object (readonly)

the root object that will be queried



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

def data
  @data
end

#what ⇒ Object (readonly)

the root object that will be queried



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

def what
  @what
end