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, subscription_topic: nil, operation_name: nil, root_value: nil, max_depth: schema.max_depth, max_complexity: schema.max_complexity, warden: 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)



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
163
164
165
166
167
168
169
170
171
# File 'lib/graphql/query.rb', line 98

def initialize(schema, query_string = nil, query: nil, document: nil, context: nil, variables: nil, validate: true, static_validator: nil, subscription_topic: nil, operation_name: nil, root_value: nil, max_depth: schema.max_depth, max_complexity: schema.max_complexity, warden: 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)
  @warden = warden
  @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_errorsObject

Returns the value of attribute analysis_errors.



322
323
324
# File 'lib/graphql/query.rb', line 322

def analysis_errors
  @analysis_errors
end

#contextObject (readonly)

Returns the value of attribute context.



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

def context
  @context
end

#loggerObject (readonly)

Returns the value of attribute logger.



378
379
380
# File 'lib/graphql/query.rb', line 378

def logger
  @logger
end

#multiplexObject

Returns the value of attribute multiplex.



182
183
184
# File 'lib/graphql/query.rb', line 182

def multiplex
  @multiplex
end

#operation_namenil, 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_variablesObject (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_stringObject

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



174
175
176
# File 'lib/graphql/query.rb', line 174

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

#result_valuesObject

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.



214
215
216
# File 'lib/graphql/query.rb', line 214

def result_values
  @result_values
end

#root_valueObject

The value for root types



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

def root_value
  @root_value
end

#schemaObject (readonly)

Returns the value of attribute schema.



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

def schema
  @schema
end

#static_validatorGraphQL::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_topicString? (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

#tracersObject (readonly)

Returns the value of attribute tracers.



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

def tracers
  @tracers
end

#validateBoolean

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

Instance Method Details

#after_lazy(value, &block) ⇒ Object



366
367
368
369
370
371
372
373
374
375
376
# File 'lib/graphql/query.rb', line 366

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_cacheObject



275
276
277
# File 'lib/graphql/query.rb', line 275

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:



271
272
273
# File 'lib/graphql/query.rb', line 271

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

#current_traceGraphQL::Tracing::Trace



185
186
187
# File 'lib/graphql/query.rb', line 185

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

#documentGraphQL::Language::Nodes::Document



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)


233
234
235
# File 'lib/graphql/query.rb', line 233

def executed?
  @executed
end

#fingerprintString

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:



301
302
303
# File 'lib/graphql/query.rb', line 301

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

#fragmentsObject



216
217
218
# File 'lib/graphql/query.rb', line 216

def fragments
  with_prepared_ast { @fragments }
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.



362
363
364
# File 'lib/graphql/query.rb', line 362

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

#inspectObject



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

def inspect
  "query ..."
end

#interpreter?Boolean

Returns:

  • (Boolean)


178
179
180
# File 'lib/graphql/query.rb', line 178

def interpreter?
  true
end

#lookaheadGraphQL::Execution::Lookahead

A lookahead for the root selections of this query



195
196
197
198
199
200
201
# File 'lib/graphql/query.rb', line 195

def lookahead
  @lookahead ||= begin
    ast_node = selected_operation
    root_type = warden.root_type_for_operation(ast_node.operation_type || "query")
    GraphQL::Execution::Lookahead.new(query: self, root_type: root_type, ast_nodes: [ast_node])
  end
end

#mutation?Boolean

Returns:

  • (Boolean)


349
350
351
# File 'lib/graphql/query.rb', line 349

def mutation?
  with_prepared_ast { @mutation }
end

#operation_fingerprintString

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



306
307
308
# File 'lib/graphql/query.rb', line 306

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

#operationsObject



220
221
222
# File 'lib/graphql/query.rb', line 220

def operations
  with_prepared_ast { @operations }
end

#query?Boolean

Returns:

  • (Boolean)


353
354
355
# File 'lib/graphql/query.rb', line 353

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`


337
338
339
340
341
342
343
344
345
346
347
# File 'lib/graphql/query.rb', line 337

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

#resultGraphQL::Query::Result

Get the result for this query, executing it once

Returns:



226
227
228
229
230
231
# File 'lib/graphql/query.rb', line 226

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



283
284
285
286
287
# File 'lib/graphql/query.rb', line 283

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

#selected_operationGraphQL::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.



244
245
246
# File 'lib/graphql/query.rb', line 244

def selected_operation
  with_prepared_ast { @selected_operation }
end

#selected_operation_nameString?

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_errorsObject



237
238
239
# File 'lib/graphql/query.rb', line 237

def static_errors
  validation_errors + analysis_errors + context.errors
end

#subscription?Boolean

Returns:

  • (Boolean)


357
358
359
# File 'lib/graphql/query.rb', line 357

def subscription?
  with_prepared_ast { @subscription }
end

#subscription_update?Boolean

Returns:

  • (Boolean)


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

def subscription_update?
  @subscription_topic && subscription?
end

#valid?Boolean

Returns:

  • (Boolean)


323
324
325
# File 'lib/graphql/query.rb', line 323

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

#validation_pipelineObject



315
316
317
# File 'lib/graphql/query.rb', line 315

def validation_pipeline
  with_prepared_ast { @validation_pipeline }
end

#variablesGraphQL::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:



254
255
256
257
258
259
260
261
262
263
264
# File 'lib/graphql/query.rb', line 254

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

#variables_fingerprintString

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)



311
312
313
# File 'lib/graphql/query.rb', line 311

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

#wardenObject



327
328
329
# File 'lib/graphql/query.rb', line 327

def warden
  with_prepared_ast { @warden }
end