Module: GraphQL::Analysis::AST

Defined in:
lib/graphql/analysis/ast/query_depth.rb,
lib/graphql/analysis/ast.rb,
lib/graphql/analysis/ast/visitor.rb,
lib/graphql/analysis/ast/analyzer.rb,
lib/graphql/analysis/ast/field_usage.rb,
lib/graphql/analysis/ast/max_query_depth.rb,
lib/graphql/analysis/ast/query_complexity.rb,
lib/graphql/analysis/ast/max_query_complexity.rb

Overview

Calculate the complexity of a query, using Field#complexity values.

Defined Under Namespace

Classes: Analyzer, FieldUsage, MaxQueryComplexity, MaxQueryDepth, QueryComplexity, QueryDepth, Visitor

Class Method Summary collapse

Class Method Details

.analysis_errors(results) ⇒ Object 



86
87
88
 
# File 'lib/graphql/analysis/ast.rb', line 86

def analysis_errors(results)
  results.flatten.tap { _1.select! { |r| r.is_a?(GraphQL::AnalysisError) } }
end

.analyze_multiplex(multiplex, analyzers) ⇒ Array<Any>

Analyze a multiplex, and all queries within. Multiplex analyzers are ran for all queries, keeping state. Query analyzers are ran per query, without carrying state between queries.

Parameters:

Returns:

  • (Array<Any>) —

    Results from multiplex analyzers



22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
 
# File 'lib/graphql/analysis/ast.rb', line 22

def analyze_multiplex(multiplex, analyzers)
  multiplex_analyzers = analyzers.map { |analyzer| analyzer.new(multiplex) }

  multiplex.current_trace.analyze_multiplex(multiplex: multiplex) do
    query_results = multiplex.queries.map do |query|
      if query.valid?
        analyze_query(
          query,
          query.analyzers,
          multiplex_analyzers: multiplex_analyzers
        )
      else
        []
      end
    end

    multiplex_results = multiplex_analyzers.map(&:result)
    multiplex_errors = analysis_errors(multiplex_results)

    multiplex.queries.each_with_index do |query, idx|
      query.analysis_errors = multiplex_errors + analysis_errors(query_results[idx])
    end
    multiplex_results
  end
end

.analyze_query(query, analyzers, multiplex_analyzers: []) ⇒ Array<Any>

Returns Results from those analyzers.

Parameters:

Returns:

  • (Array<Any>) —

    Results from those analyzers



51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
 
# File 'lib/graphql/analysis/ast.rb', line 51

def analyze_query(query, analyzers, multiplex_analyzers: [])
  query.current_trace.analyze_query(query: query) do
    query_analyzers = analyzers
      .map { |analyzer| analyzer.new(query) }
      .tap { _1.select!(&:analyze?) }

    analyzers_to_run = query_analyzers + multiplex_analyzers
    if analyzers_to_run.any?

      analyzers_to_run.select!(&:visit?)
      if analyzers_to_run.any?
        visitor = GraphQL::Analysis::AST::Visitor.new(
          query: query,
          analyzers: analyzers_to_run
        )

        # `nil` or `0` causes no timeout
        Timeout::timeout(query.validate_timeout_remaining) do
          visitor.visit
        end

        if visitor.rescued_errors.any?
          return visitor.rescued_errors
        end
      end

      query_analyzers.map(&:result)
    else
      []
    end
  end
rescue Timeout::Error
  [GraphQL::AnalysisError.new("Timeout on validation of query")]
end