Class: GraphQL::Execution::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/graphql/execution/runner.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(multiplex, authorization:) ⇒ Runner

Returns a new instance of Runner.



5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
# File 'lib/graphql/execution/runner.rb', line 5

def initialize(multiplex, authorization:)
  @multiplex = multiplex
  @schema = multiplex.schema
  @steps_queue = []
  @runtime_type_at = {}.compare_by_identity
  @static_type_at = {}.compare_by_identity
  @finalizers = nil
  @selected_operation = nil
  @dataloader = multiplex.context[:dataloader] ||= @schema.dataloader_class.new
  @resolves_lazies = @schema.resolves_lazies?
  @input_values = Hash.new do |h, query|
    h[query] = InputValues.new(query, self)
  end.compare_by_identity

  @runtime_directives = nil
  @schema.directives.each do |name, dir_class|
    if dir_class.runtime? && name != "include" && name != "skip"
      @runtime_directives ||= {}
      @runtime_directives[dir_class.graphql_name] = dir_class
    end
  end

  if @runtime_directives.nil?
    @uses_runtime_directives = false
    @runtime_directives = EmptyObjects::EMPTY_HASH
  else
    @uses_runtime_directives = true
  end

  @lazy_cache = resolves_lazies ? {}.compare_by_identity : nil
  @authorization = authorization
  if @authorization
    @authorizes_cache = Hash.new do |h, query_context|
      h[query_context] = {}.compare_by_identity
    end.compare_by_identity
  end
end

Instance Attribute Details

#authorization ⇒ Object (readonly)

Returns the value of attribute authorization.



66
67
68
 
# File 'lib/graphql/execution/runner.rb', line 66

def authorization
  @authorization
end

#authorizes ⇒ Object (readonly)

Returns the value of attribute authorizes.



66
67
68
 
# File 'lib/graphql/execution/runner.rb', line 66

def authorizes
  @authorizes
end

#dataloader ⇒ Object (readonly)

Returns the value of attribute dataloader.



66
67
68
 
# File 'lib/graphql/execution/runner.rb', line 66

def dataloader
  @dataloader
end

#finalizer_keys ⇒ Object (readonly)

Returns the value of attribute finalizer_keys.



43
44
45
 
# File 'lib/graphql/execution/runner.rb', line 43

def finalizer_keys
  @finalizer_keys
end

#finalizers ⇒ Object (readonly)

Returns the value of attribute finalizers.



66
67
68
 
# File 'lib/graphql/execution/runner.rb', line 66

def finalizers
  @finalizers
end

#input_values ⇒ Object (readonly)

Returns the value of attribute input_values.



66
67
68
 
# File 'lib/graphql/execution/runner.rb', line 66

def input_values
  @input_values
end

#resolves_lazies ⇒ Object (readonly)

Returns the value of attribute resolves_lazies.



66
67
68
 
# File 'lib/graphql/execution/runner.rb', line 66

def resolves_lazies
  @resolves_lazies
end

#runtime_directives ⇒ Object (readonly)

Returns the value of attribute runtime_directives.



43
44
45
 
# File 'lib/graphql/execution/runner.rb', line 43

def runtime_directives
  @runtime_directives
end

#runtime_type_at ⇒ Object (readonly)

Returns the value of attribute runtime_type_at.



66
67
68
 
# File 'lib/graphql/execution/runner.rb', line 66

def runtime_type_at
  @runtime_type_at
end

#schema ⇒ Object (readonly)

Returns the value of attribute schema.



66
67
68
 
# File 'lib/graphql/execution/runner.rb', line 66

def schema
  @schema
end

#static_type_at ⇒ Object (readonly)

Returns the value of attribute static_type_at.



66
67
68
 
# File 'lib/graphql/execution/runner.rb', line 66

def static_type_at
  @static_type_at
end

#steps_queue ⇒ Object (readonly)

Returns the value of attribute steps_queue.



66
67
68
 
# File 'lib/graphql/execution/runner.rb', line 66

def steps_queue
  @steps_queue
end

#uses_runtime_directives ⇒ Object (readonly)

Returns the value of attribute uses_runtime_directives.



43
44
45
 
# File 'lib/graphql/execution/runner.rb', line 43

def uses_runtime_directives
  @uses_runtime_directives
end

#variables ⇒ Object (readonly)

Returns the value of attribute variables.



66
67
68
 
# File 'lib/graphql/execution/runner.rb', line 66

def variables
  @variables
end

Instance Method Details

#add_finalizer(query, result_value, key, finalizer) ⇒ void

This method returns an undefined value.



69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
 
# File 'lib/graphql/execution/runner.rb', line 69

def add_finalizer(query, result_value, key, finalizer)
  @finalizers ||= {}.compare_by_identity
  f_for_query = @finalizers[query] ||= {}.compare_by_identity
  f_for_result = f_for_query[result_value] ||= {}.compare_by_identity
  if (f = f_for_result[key])
    if f.is_a?(Array)
      f << finalizer
    else
      f_for_result[key] = [f, finalizer]
    end
  else
    f_for_result[key] = finalizer
  end
  nil
end

#add_step(step) ⇒ Object 



62
63
64
 
# File 'lib/graphql/execution/runner.rb', line 62

def add_step(step)
  @dataloader.append_job(step)
end

#authorizes?(graphql_definition, query_context) ⇒ Boolean

Returns:

  • (Boolean) 


52
53
54
55
56
57
58
59
60
 
# File 'lib/graphql/execution/runner.rb', line 52

def authorizes?(graphql_definition, query_context)
  auth_cache = @authorizes_cache[query_context]
  case (auth_res = auth_cache[graphql_definition])
  when nil
    auth_cache[graphql_definition] = graphql_definition.authorizes?(query_context)
  else
    auth_res
  end
end

#execute ⇒ Object 



85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
 
# File 'lib/graphql/execution/runner.rb', line 85

def execute
  Fiber[:__graphql_current_multiplex] = @multiplex
  isolated_steps = [[]]
  trace = @multiplex.current_trace
  queries = @multiplex.queries
  multiplex_analyzers = @schema.multiplex_analyzers
  if @multiplex.max_complexity
    multiplex_analyzers += [GraphQL::Analysis::MaxQueryComplexity]
  end

  trace.execute_multiplex(multiplex: @multiplex) do
    trace.begin_analyze_multiplex(@multiplex, multiplex_analyzers)
    @schema.analysis_engine.analyze_multiplex(@multiplex, multiplex_analyzers)
    trace.end_analyze_multiplex(@multiplex, multiplex_analyzers)

    results = []
    queries.each do |query|
      if query.validate && !query.valid?
        results << {
          "errors" => query.static_errors.map(&:to_h)
        }
        next
      end

      root_type = query.root_type

      if root_type.non_null?
        root_type = root_type.of_type
      end

      root_value = query.root_value
      if resolves_lazies
        root_value = schema.sync_lazy(root_value)
      end

      trace.execute_query(query: query) do
        begin_execute(isolated_steps, results, query, root_type, root_value)
      end
    end

    trace.execute_query_lazy(query: nil, multiplex: @multiplex) do
      while (next_isolated_steps = isolated_steps.shift)
        next_isolated_steps.each do |step|
          add_step(step)
        end
        @dataloader.run
      end
    end

    queries.each_with_index.map do |query, idx|
      result = results[idx]

      fin_result = if (!@finalizers&.key?(query) && query.context.errors.empty?) || !query.valid?
        result
      else
        data = result["data"]
        data = Finalize.new(query, data, self).run
        errors = []
        query.context.errors.each do |err|
          if err.respond_to?(:to_h)
            errors << err.to_h
          end
        end
        res_h = {}
        if !errors.empty?
          res_h["errors"] = errors
        end
        res_h["data"] = data
        res_h
      end

      query.result_values = fin_result
      query.result
    end
  end
ensure
  Fiber[:__graphql_current_multiplex] = nil
end

#gather_selections(type_defn, ast_selections, selections_step, query, all_selections, prototype_result, into:) ⇒ Object 



164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
 
# File 'lib/graphql/execution/runner.rb', line 164

def gather_selections(type_defn, ast_selections, selections_step, query, all_selections, prototype_result, into:)
  ast_selections.each do |ast_selection|
    next if !directives_include?(query, ast_selection)

    case ast_selection
    when GraphQL::Language::Nodes::Field
      key = ast_selection.alias || ast_selection.name
      step = into[key] ||= begin
        prototype_result[key] = nil

        FieldResolveStep.new(
          selections_step: selections_step,
          key: key,
          parent_type: type_defn,
          runner: self,
        )
      end
      step.append_selection(ast_selection)
    when GraphQL::Language::Nodes::InlineFragment
      type_condition = ast_selection.type&.name
      if type_condition.nil? || type_condition_applies?(query.context, type_defn, type_condition)
        if uses_runtime_directives && !ast_selection.directives.empty?
          all_selections << (into = { __node: ast_selection })
          all_selections << (prototype_result = {})
        end
        gather_selections(type_defn, ast_selection.selections, selections_step, query, all_selections, prototype_result, into: into)
      end
    when GraphQL::Language::Nodes::FragmentSpread
      fragment_definition = query.fragments[ast_selection.name]
      type_condition = fragment_definition.type.name
      if type_condition_applies?(query.context, type_defn, type_condition)
        if uses_runtime_directives && !ast_selection.directives.empty?
          all_selections << (into = { __node: ast_selection })
          all_selections << (prototype_result = {})
        end
        gather_selections(type_defn, fragment_definition.selections, selections_step, query, all_selections, prototype_result, into: into)
      end
    else
      raise ArgumentError, "Unsupported graphql selection node: #{ast_selection.class} (#{ast_selection.inspect})"
    end
  end
end

#lazy?(object) ⇒ Boolean

Returns:

  • (Boolean) 


207
208
209
210
211
212
213
214
 
# File 'lib/graphql/execution/runner.rb', line 207

def lazy?(object)
  obj_class = object.class
  is_lazy = @lazy_cache[obj_class]
  if is_lazy.nil?
    is_lazy = @lazy_cache[obj_class] = @schema.lazy?(object)
  end
  is_lazy
end

#resolve_type(type, object, query) ⇒ Object 



45
46
47
48
49
50
 
# File 'lib/graphql/execution/runner.rb', line 45

def resolve_type(type, object, query)
  query.current_trace.begin_resolve_type(type, object, query.context)
  resolved_type, _ignored_new_value = query.resolve_type(type, object)
  query.current_trace.end_resolve_type(type, object, query.context, resolved_type)
  resolved_type
end

#type_condition_applies?(context, concrete_type, type_name) ⇒ Boolean

Returns:

  • (Boolean) 


216
217
218
219
220
221
222
223
224
225
 
# File 'lib/graphql/execution/runner.rb', line 216

def type_condition_applies?(context, concrete_type, type_name)
  if type_name == concrete_type.graphql_name
    true
  else
    abs_t = @schema.get_type(type_name, context)
    p_types = @schema.possible_types(abs_t, context)
    c_p_types = @schema.possible_types(concrete_type, context)
    p_types.any? { |t| c_p_types.include?(t) }
  end
end