Class: Quandl::List

Inherits:
Object
  • Object
show all
Defined in:
lib/quandl/model/list.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(klass, values, meta) ⇒ List

Returns a new instance of List.



6
7
8
9
10
 
# File 'lib/quandl/model/list.rb', line 6

def initialize(klass, values, meta)
  @klass = klass
  @values = values.map { |v| klass.new(v, meta: meta) }
  @meta = meta
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method_name, *args, &block) ⇒ Object (private) 



38
39
40
41
42
43
 
# File 'lib/quandl/model/list.rb', line 38

def method_missing(method_name, *args, &block)
  return @meta[method_name.to_s] if @meta.key?(method_name.to_s)
  return @meta[*args] if method_name.to_s == '[]' && @meta.key?(args[0].to_s)
  return @values.method(method_name).call(*args, &block) if @values.respond_to?(method_name)
  super
end

Instance Attribute Details

#meta ⇒ Object (readonly)

Returns the value of attribute meta.



3
4
5
 
# File 'lib/quandl/model/list.rb', line 3

def meta
  @meta
end

#values ⇒ Object (readonly)

Returns the value of attribute values.



4
5
6
 
# File 'lib/quandl/model/list.rb', line 4

def values
  @values
end

Instance Method Details

#inspect ⇒ Object 



32
33
34
 
# File 'lib/quandl/model/list.rb', line 32

def inspect
  { meta: @meta, values: @values }.to_s
end

#more_results? ⇒ Boolean

Returns:

  • (Boolean) 


12
13
14
15
 
# File 'lib/quandl/model/list.rb', line 12

def more_results?
  fail(QuandlError, "#{@klass} does not support pagination yet") if !@meta.key?('total_pages') && !@meta.key?('current_page')
  @meta['total_pages'] > @meta['current_page']
end

#to_a ⇒ Object 



17
18
19
 
# File 'lib/quandl/model/list.rb', line 17

def to_a
  @values.map(&:to_a)
end

#to_csv ⇒ Object 



21
22
23
24
25
26
27
28
29
30
 
# File 'lib/quandl/model/list.rb', line 21

def to_csv
  fail(QuandlError, 'No values to export') if @values.empty?

  CSV.generate do |csv|
    csv << @values.first.column_names
    @values.each do |row|
      csv << row.to_a
    end
  end
end