Class: Commutator::Options::Query

Inherits:
Object
  • Object
show all
Includes:
Util::Fluent
Defined in:
lib/commutator/options/query.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Query

Returns a new instance of Query.



27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
# File 'lib/commutator/options/query.rb', line 27

def initialize
  @expression_attribute_values ||= Expressions::AttributeValues.new
  @expression_attribute_names ||= Expressions::AttributeNames.new

  @key_condition_expression ||= Expressions::ConditionExpression.new(
    attribute_names: @expression_attribute_names,
    attribute_values: @expression_attribute_values)

  @filter_expression ||= Expressions::ConditionExpression.new(
    attribute_names: @expression_attribute_names,
    attribute_values: @expression_attribute_values)

  @projection_expression ||= Expressions::ProjectionExpression.new(
    attribute_names: @expression_attribute_names)
end

Instance Method Details

#asc ⇒ Object 



43
44
45
 
# File 'lib/commutator/options/query.rb', line 43

def asc
  scan_index_forward(true)
end

#desc ⇒ Object 



47
48
49
 
# File 'lib/commutator/options/query.rb', line 47

def desc
  scan_index_forward(false)
end

#to_h ⇒ Object Also known as: to_hash 



51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
 
# File 'lib/commutator/options/query.rb', line 51

def to_h
  hash = {
    table_name: table_name,
    limit: limit,
    consistent_read: consistent_read,
    index_name: index_name,
    select: select,
    exclusive_start_key: exclusive_start_key,
    scan_index_forward: scan_index_forward,
    return_consumed_capacity: return_consumed_capacity,
    projection_expression: projection_expression.to_s,
    expression_attribute_names: expression_attribute_names.to_h,
    expression_attribute_values: expression_attribute_values.to_h,
    key_condition_expression: key_condition_expression.to_s(wrap: false),
    filter_expression: filter_expression.to_s(wrap: false)
  }

  hash.keep_if { |_key, value| value.present? || value == false }
end