Class: GraphQL::Query

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Includes:
Tracing::Traceable
Defined in:
lib/graphql/query.rb,
lib/graphql/query/result.rb,
lib/graphql/query/context.rb,
lib/graphql/query/variables.rb,
lib/graphql/query/fingerprint.rb,
lib/graphql/query/null_context.rb,
lib/graphql/query/validation_pipeline.rb,
lib/graphql/query/context/scoped_context.rb,
lib/graphql/query/input_validation_result.rb,
lib/graphql/query/variable_validation_error.rb

Overview

A combination of query string and Schema instance which can be reduced to a #result.

Defined Under Namespace

Modules: Fingerprint Classes: Context, InputValidationResult, NullContext, OperationNameMissingError, Result, ValidationPipeline, VariableValidationError, Variables

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Tracing::Traceable

#trace

Constructor Details

#initialize(schema, query_string = nil, query: nil, document: nil, context: nil, variables: nil, validate: true, static_validator: nil, visibility_profile: nil, subscription_topic: nil, operation_name: nil, root_value: nil, max_depth: schema.max_depth, max_complexity: schema.max_complexity, warden: nil, use_visibility_profile: nil) ⇒ Query

Prepare query query_string on schema

Parameters:

  • schema (GraphQL::Schema)
  • query_string (String) (defaults to: nil)
  • context (#[]) (defaults to: nil) —

    an arbitrary hash of values which you can access in Field#resolve

  • variables (Hash) (defaults to: nil) —

    values for $variables in the query

  • operation_name (String) (defaults to: nil) —

    if the query string contains many operations, this is the one which should be executed

  • root_value (Object) (defaults to: nil) —

    the object used to resolve fields on the root type

  • max_depth (Numeric) (defaults to: schema.max_depth) —

    the maximum number of nested selections allowed for this query (falls back to schema-level value)

  • max_complexity (Numeric) (defaults to: schema.max_complexity) —

    the maximum field complexity for this query (falls back to schema-level value)

  • visibility_profile (Symbol) (defaults to: nil) 


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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
 
# File 'lib/graphql/query.rb', line 99

def initialize(schema, query_string = nil, query: nil, document: nil, context: nil, variables: nil, validate: true, static_validator: nil, visibility_profile: nil, subscription_topic: nil, operation_name: nil, root_value: nil, max_depth: schema.max_depth, max_complexity: schema.max_complexity, warden: nil, use_visibility_profile: nil)
  # Even if `variables: nil` is passed, use an empty hash for simpler logic
  variables ||= {}
  @schema = schema
  @context = schema.context_class.new(query: self, values: context)

  if use_visibility_profile.nil?
    use_visibility_profile = warden ? false : schema.use_visibility_profile?
  end

  @visibility_profile = visibility_profile

  if use_visibility_profile
    @visibility_profile = @schema.visibility.profile_for(@context, visibility_profile)
    @warden = Schema::Warden::NullWarden.new(context: @context, schema: @schema)
  else
    @visibility_profile = nil
    @warden = warden
  end

  @subscription_topic = subscription_topic
  @root_value = root_value
  @fragments = nil
  @operations = nil
  @validate = validate
  self.static_validator = static_validator if static_validator
  context_tracers = (context ? context.fetch(:tracers, []) : [])
  @tracers = schema.tracers + context_tracers

  # Support `ctx[:backtrace] = true` for wrapping backtraces
  if context && context[:backtrace] && !@tracers.include?(GraphQL::Backtrace::Tracer)
    if schema.trace_class <= GraphQL::Tracing::CallLegacyTracers
      context_tracers += [GraphQL::Backtrace::Tracer]
      @tracers << GraphQL::Backtrace::Tracer
    end
  end

  if context_tracers.any? && !(schema.trace_class <= GraphQL::Tracing::CallLegacyTracers)
    raise ArgumentError, "context[:tracers] are not supported without `trace_with(GraphQL::Tracing::CallLegacyTracers)` in the schema configuration, please add it."
  end

  @analysis_errors = []
  if variables.is_a?(String)
    raise ArgumentError, "Query variables should be a Hash, not a String. Try JSON.parse to prepare variables."
  else
    @provided_variables = variables || {}
  end

  @query_string = query_string || query
  @document = document

  if @query_string && @document
    raise ArgumentError, "Query should only be provided a query string or a document, not both."
  end

  if @query_string && !@query_string.is_a?(String)
    raise ArgumentError, "Query string argument should be a String, got #{@query_string.class.name} instead."
  end

  # A two-layer cache of type resolution:
  # { abstract_type => { value => resolved_type } }
  @resolved_types_cache = Hash.new do |h1, k1|
    h1[k1] = Hash.new do |h2, k2|
      h2[k2] = @schema.resolve_type(k1, k2, @context)
    end
  end

  # Trying to execute a document
  # with no operations returns an empty hash
  @ast_variables = []
  @mutation = false
  @operation_name = operation_name
  @prepared_ast = false
  @validation_pipeline = nil
  @max_depth = max_depth
  @max_complexity = max_complexity

  @result_values = nil
  @executed = false

  @logger = if context && context[:logger] == false
    Logger.new(IO::NULL)
  elsif context && (l = context[:logger])
    l
  else
    schema.default_logger
  end
end

Instance Attribute Details

#analysis_errors ⇒ Object

Returns the value of attribute analysis_errors.



347
348
349
 
# File 'lib/graphql/query.rb', line 347

def analysis_errors
  @analysis_errors
end

#context ⇒ Object (readonly)

Returns the value of attribute context.



28
29
30
 
# File 'lib/graphql/query.rb', line 28

def context
  @context
end

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



430
431
432
 
# File 'lib/graphql/query.rb', line 430

def logger
  @logger
end

#multiplex ⇒ Object

Returns the value of attribute multiplex.



196
197
198
 
# File 'lib/graphql/query.rb', line 196

def multiplex
  @multiplex
end

#operation_name ⇒ nil, String

Returns The operation name provided by client or the one inferred from the document. Used to determine which operation to run.

Returns:

  • (nil, String) —

    The operation name provided by client or the one inferred from the document. Used to determine which operation to run.



34
35
36
 
# File 'lib/graphql/query.rb', line 34

def operation_name
  @operation_name
end

#provided_variables ⇒ Object (readonly)

Returns the value of attribute provided_variables.



28
29
30
 
# File 'lib/graphql/query.rb', line 28

def provided_variables
  @provided_variables
end

#query_string ⇒ Object

If a document was provided to GraphQL::Schema#execute instead of the raw query string, we will need to get it from the document



189
190
191
 
# File 'lib/graphql/query.rb', line 189

def query_string
  @query_string ||= (document ? document.to_query_string : nil)
end

#result_values ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



239
240
241
 
# File 'lib/graphql/query.rb', line 239

def result_values
  @result_values
end

#root_value ⇒ Object

The value for root types



31
32
33
 
# File 'lib/graphql/query.rb', line 31

def root_value
  @root_value
end

#schema ⇒ Object (readonly)

Returns the value of attribute schema.



28
29
30
 
# File 'lib/graphql/query.rb', line 28

def schema
  @schema
end

#static_validator ⇒ GraphQL::StaticValidation::Validator

Returns if present, the query will validate with these rules.

Returns:



49
50
51
 
# File 'lib/graphql/query.rb', line 49

def static_validator
  @static_validator
end

#subscription_topic ⇒ String? (readonly)

Returns the triggered event, if this query is a subscription update.

Returns:

  • (String, nil) —

    the triggered event, if this query is a subscription update



85
86
87
 
# File 'lib/graphql/query.rb', line 85

def subscription_topic
  @subscription_topic
end

#tracers ⇒ Object (readonly)

Returns the value of attribute tracers.



87
88
89
 
# File 'lib/graphql/query.rb', line 87

def tracers
  @tracers
end

#validate ⇒ Boolean

Returns if false, static validation is skipped (execution behavior for invalid queries is undefined).

Returns:

  • (Boolean) —

    if false, static validation is skipped (execution behavior for invalid queries is undefined)



37
38
39
 
# File 'lib/graphql/query.rb', line 37

def validate
  @validate
end

#visibility_profile ⇒ Symbol? (readonly)

Returns:

  • (Symbol, nil) 


194
195
196
 
# File 'lib/graphql/query.rb', line 194

def visibility_profile
  @visibility_profile
end

Instance Method Details

#after_lazy(value, &block) ⇒ Object 



418
419
420
421
422
423
424
425
426
427
428
 
# File 'lib/graphql/query.rb', line 418

def after_lazy(value, &block)
  if !defined?(@runtime_instance)
    @runtime_instance = context.namespace(:interpreter_runtime)[:runtime]
  end

  if @runtime_instance
    @runtime_instance.minimal_after_lazy(value, &block)
  else
    @schema.after_lazy(value, &block)
  end
end

#arguments_cache ⇒ Object 



300
301
302
 
# File 'lib/graphql/query.rb', line 300

def arguments_cache
  @arguments_cache ||= Execution::Interpreter::ArgumentsCache.new(self)
end

#arguments_for(ast_node, definition, parent_object: nil) ⇒ Object

Node-level cache for calculating arguments. Used during execution and query analysis.

Parameters:



296
297
298
 
# File 'lib/graphql/query.rb', line 296

def arguments_for(ast_node, definition, parent_object: nil)
  arguments_cache.fetch(ast_node, definition, parent_object)
end

#current_trace ⇒ GraphQL::Tracing::Trace

Returns:



199
200
201
 
# File 'lib/graphql/query.rb', line 199

def current_trace
  @current_trace ||= context[:trace] || (multiplex ? multiplex.current_trace : schema.new_trace(multiplex: multiplex, query: self))
end

#document ⇒ GraphQL::Language::Nodes::Document

Returns:



65
66
67
68
69
70
71
72
 
# File 'lib/graphql/query.rb', line 65

def document
  # It's ok if this hasn't been assigned yet
  if @query_string || @document
    with_prepared_ast { @document }
  else
    nil
  end
end

#executed? ⇒ Boolean

Returns:

  • (Boolean) 


258
259
260
 
# File 'lib/graphql/query.rb', line 258

def executed?
  @executed
end

#fingerprint ⇒ String

This contains a few components:

  • The selected operation name (or anonymous)
  • The fingerprint of the query string
  • The number of given variables (for readability)
  • The fingerprint of the given variables

This fingerprint can be used to track runs of the same operation-variables combination over time.

Returns:

  • (String) —

    An opaque hash identifying this operation-variables combination

See Also:



326
327
328
 
# File 'lib/graphql/query.rb', line 326

def fingerprint
  @fingerprint ||= "#{operation_fingerprint}/#{variables_fingerprint}"
end

#fragments ⇒ Object 



241
242
243
 
# File 'lib/graphql/query.rb', line 241

def fragments
  with_prepared_ast { @fragments }
end

#get_field(owner, field_name) ⇒ Object 



360
361
362
 
# File 'lib/graphql/query.rb', line 360

def get_field(owner, field_name)
  types.field(owner, field_name) # rubocop:disable Development/ContextIsPassedCop
end

#get_type(type_name) ⇒ Object 



356
357
358
 
# File 'lib/graphql/query.rb', line 356

def get_type(type_name)
  types.type(type_name) # rubocop:disable Development/ContextIsPassedCop
end

#handle_or_reraise(err) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



414
415
416
 
# File 'lib/graphql/query.rb', line 414

def handle_or_reraise(err)
  schema.handle_or_reraise(context, err)
end

#inspect ⇒ Object 



74
75
76
 
# File 'lib/graphql/query.rb', line 74

def inspect
  "query ..."
end

#lookahead ⇒ GraphQL::Execution::Lookahead

A lookahead for the root selections of this query

Returns:



209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
 
# File 'lib/graphql/query.rb', line 209

def lookahead
  @lookahead ||= begin
    ast_node = selected_operation
    if ast_node.nil?
      GraphQL::Execution::Lookahead::NULL_LOOKAHEAD
    else
      root_type = case ast_node.operation_type
      when nil, "query"
        types.query_root # rubocop:disable Development/ContextIsPassedCop
      when "mutation"
        types.mutation_root # rubocop:disable Development/ContextIsPassedCop
      when "subscription"
        types.subscription_root # rubocop:disable Development/ContextIsPassedCop
      end
      GraphQL::Execution::Lookahead.new(query: self, root_type: root_type, ast_nodes: [ast_node])
    end
  end
end

#mutation? ⇒ Boolean

Returns:

  • (Boolean) 


401
402
403
 
# File 'lib/graphql/query.rb', line 401

def mutation?
  with_prepared_ast { @mutation }
end

#operation_fingerprint ⇒ String

Returns An opaque hash for identifying this query's given query string and selected operation.

Returns:

  • (String) —

    An opaque hash for identifying this query's given query string and selected operation



331
332
333
 
# File 'lib/graphql/query.rb', line 331

def operation_fingerprint
  @operation_fingerprint ||= "#{selected_operation_name || "anonymous"}/#{Fingerprint.generate(query_string || "")}"
end

#operations ⇒ Object 



245
246
247
 
# File 'lib/graphql/query.rb', line 245

def operations
  with_prepared_ast { @operations }
end

#possible_types(type) ⇒ Object 



364
365
366
 
# File 'lib/graphql/query.rb', line 364

def possible_types(type)
  types.possible_types(type) # rubocop:disable Development/ContextIsPassedCop
end

#query? ⇒ Boolean

Returns:

  • (Boolean) 


405
406
407
 
# File 'lib/graphql/query.rb', line 405

def query?
  with_prepared_ast { @query }
end

#resolve_type(abstract_type, value = NOT_CONFIGURED) ⇒ GraphQL::ObjectType?

Returns The runtime type of value from Schema.resolve_type.

Parameters:

  • abstract_type (GraphQL::UnionType, GraphQL::InterfaceType)
  • value (Object) (defaults to: NOT_CONFIGURED) —

    Any runtime value

Returns:

See Also:

  • to apply filtering from `only` / `except`


389
390
391
392
393
394
395
396
397
398
399
 
# File 'lib/graphql/query.rb', line 389

def resolve_type(abstract_type, value = NOT_CONFIGURED)
  if value.is_a?(Symbol) && value == NOT_CONFIGURED
    # Old method signature
    value = abstract_type
    abstract_type = nil
  end
  if value.is_a?(GraphQL::Schema::Object)
    value = value.object
  end
  @resolved_types_cache[abstract_type][value]
end

#result ⇒ GraphQL::Query::Result

Get the result for this query, executing it once

Returns:



251
252
253
254
255
256
 
# File 'lib/graphql/query.rb', line 251

def result
  if !@executed
    Execution::Interpreter.run_all(@schema, [self], context: @context)
  end
  @result ||= Query::Result.new(query: self, values: @result_values)
end

#root_type_for_operation(op_type) ⇒ Object 



368
369
370
371
372
373
374
375
376
377
378
379
 
# File 'lib/graphql/query.rb', line 368

def root_type_for_operation(op_type)
  case op_type
  when "query"
    types.query_root # rubocop:disable Development/ContextIsPassedCop
  when "mutation"
    types.mutation_root # rubocop:disable Development/ContextIsPassedCop
  when "subscription"
    types.subscription_root # rubocop:disable Development/ContextIsPassedCop
  else
    raise ArgumentError, "unexpected root type name: #{op_type.inspect}; expected 'query', 'mutation', or 'subscription'"
  end
end

#sanitized_query_string(inline_variables: true) ⇒ String?

A version of the given query string, with:

  • Variables inlined to the query
  • Strings replaced with <REDACTED>

Returns:

  • (String, nil) —

    Returns nil if the query is invalid.



308
309
310
311
312
 
# File 'lib/graphql/query.rb', line 308

def sanitized_query_string(inline_variables: true)
  with_prepared_ast {
    schema.sanitized_printer.new(self, inline_variables: inline_variables).sanitized_query_string
  }
end

#selected_operation ⇒ GraphQL::Language::Nodes::OperationDefinition?

This is the operation to run for this query. If more than one operation is present, it must be named at runtime.

Returns:



269
270
271
 
# File 'lib/graphql/query.rb', line 269

def selected_operation
  with_prepared_ast { @selected_operation }
end

#selected_operation_name ⇒ String?

Returns The name of the operation to run (may be inferred).

Returns:

  • (String, nil) —

    The name of the operation to run (may be inferred)



79
80
81
82
 
# File 'lib/graphql/query.rb', line 79

def selected_operation_name
  return nil unless selected_operation
  selected_operation.name
end

#static_errors ⇒ Object 



262
263
264
 
# File 'lib/graphql/query.rb', line 262

def static_errors
  validation_errors + analysis_errors + context.errors
end

#subscription? ⇒ Boolean

Returns:

  • (Boolean) 


409
410
411
 
# File 'lib/graphql/query.rb', line 409

def subscription?
  with_prepared_ast { @subscription }
end

#subscription_update? ⇒ Boolean

Returns:

  • (Boolean) 


203
204
205
 
# File 'lib/graphql/query.rb', line 203

def subscription_update?
  @subscription_topic && subscription?
end

#types ⇒ Object 



381
382
383
 
# File 'lib/graphql/query.rb', line 381

def types
  @visibility_profile || warden.visibility_profile
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


348
349
350
 
# File 'lib/graphql/query.rb', line 348

def valid?
  validation_pipeline.valid? && analysis_errors.empty?
end

#validation_pipeline ⇒ Object 



340
341
342
 
# File 'lib/graphql/query.rb', line 340

def validation_pipeline
  with_prepared_ast { @validation_pipeline }
end

#variables ⇒ GraphQL::Query::Variables

Determine the values for variables of this query, using default values if a value isn't provided at runtime.

If some variable is invalid, errors are added to #validation_errors.

Returns:



279
280
281
282
283
284
285
286
287
288
289
 
# File 'lib/graphql/query.rb', line 279

def variables
  @variables ||= begin
    with_prepared_ast {
      GraphQL::Query::Variables.new(
        @context,
        @ast_variables,
        @provided_variables,
      )
    }
  end
end

#variables_fingerprint ⇒ String

Returns An opaque hash for identifying this query's given a variable values (not including defaults).

Returns:

  • (String) —

    An opaque hash for identifying this query's given a variable values (not including defaults)



336
337
338
 
# File 'lib/graphql/query.rb', line 336

def variables_fingerprint
  @variables_fingerprint ||= "#{provided_variables.size}/#{Fingerprint.generate(provided_variables.to_json)}"
end

#warden ⇒ Object 



352
353
354
 
# File 'lib/graphql/query.rb', line 352

def warden
  with_prepared_ast { @warden }
end