Class: GraphQL::Query

Inherits:
Object
  • Object
show all
Extended by:
Forwardable, Autoload
Includes:
Runnable, Tracing::Traceable
Defined in:
lib/graphql/query.rb,
lib/graphql/query/result.rb,
lib/graphql/query/context.rb,
lib/graphql/query/partial.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, Runnable Classes: Context, InputValidationResult, NullContext, OperationNameMissingError, Partial, Result, ValidationPipeline, VariableValidationError, Variables

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Autoload

autoload, eager_load!

Methods included from Runnable

#after_lazy, #arguments_cache, #arguments_for, #handle_or_reraise

Methods included from Tracing::Traceable

#trace

Constructor Details

#initialize(schema, query_string = nil, query: nil, document: nil, context: nil, variables: nil, multiplex: 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) —

    Another way to assign context[:visibility_profile]



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# File 'lib/graphql/query.rb', line 136

def initialize(schema, query_string = nil, query: nil, document: nil, context: nil, variables: nil, multiplex: 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 ||= {}
  @multiplex = multiplex
  @schema = schema
  @context = schema.context_class.new(query: self, values: context)
  if visibility_profile
    @context[:visibility_profile] ||= visibility_profile
  end

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

  if use_visibility_profile
    @visibility_profile = @schema.visibility.profile_for(@context)
    @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
  @finalizers = @top_level_finalizers = nil
  @validate = validate
  self.static_validator = static_validator if static_validator
  context_tracers = (context ? context.fetch(:tracers, []) : [])
  @tracers = schema.tracers + context_tracers

  if !context_tracers.empty? && !(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 = schema.logger_for(context)
end

Instance Attribute Details

#analysis_errors ⇒ Object

Returns the value of attribute analysis_errors.



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# File 'lib/graphql/query.rb', line 371

def analysis_errors
  @analysis_errors
end

#context ⇒ Object (readonly)

Returns the value of attribute context.



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# File 'lib/graphql/query.rb', line 65

def context
  @context
end

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/graphql/query.rb', line 441

def logger
  @logger
end

#multiplex ⇒ Object

Returns the value of attribute multiplex.



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

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.



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# File 'lib/graphql/query.rb', line 71

def operation_name
  @operation_name
end

#provided_variables ⇒ Object (readonly)

Returns the value of attribute provided_variables.



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# File 'lib/graphql/query.rb', line 65

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



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

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. 



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# File 'lib/graphql/query.rb', line 256

def result_values
  @result_values
end

#root_value ⇒ Object

The value for root types



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# File 'lib/graphql/query.rb', line 68

def root_value
  @root_value
end

#schema ⇒ Object (readonly)

Returns the value of attribute schema.



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# File 'lib/graphql/query.rb', line 65

def schema
  @schema
end

#static_validator ⇒ GraphQL::StaticValidation::Validator

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

Returns:



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

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



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# File 'lib/graphql/query.rb', line 122

def subscription_topic
  @subscription_topic
end

#tracers ⇒ Object (readonly)

Returns the value of attribute tracers.



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# File 'lib/graphql/query.rb', line 124

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)



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

def validate
  @validate
end

#visibility_profile ⇒ Symbol? (readonly)

Returns:

  • (Symbol, nil) 


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

def visibility_profile
  @visibility_profile
end

Instance Method Details

#current_trace ⇒ GraphQL::Tracing::Trace

Returns:



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# File 'lib/graphql/query.rb', line 225

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:



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# File 'lib/graphql/query.rb', line 102

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) 


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# File 'lib/graphql/query.rb', line 295

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:



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

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

#fragments ⇒ Object 



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

def fragments
  with_prepared_ast { @fragments }
end

#get_field(owner, field_name) ⇒ Object 



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# File 'lib/graphql/query.rb', line 384

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

#get_type(type_name) ⇒ Object 



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

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

#inspect ⇒ Object 



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# File 'lib/graphql/query.rb', line 111

def inspect
  "query ..."
end

#lookahead ⇒ GraphQL::Execution::Lookahead

A lookahead for the root selections of this query

Returns:



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

def lookahead
  @lookahead ||= begin
    if selected_operation.nil?
      GraphQL::Execution::Lookahead::NULL_LOOKAHEAD
    else
      GraphQL::Execution::Lookahead.new(query: self, root_type: root_type, ast_nodes: [selected_operation])
    end
  end
end

#mutation? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/query.rb', line 429

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



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

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

#operations ⇒ Object 



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

def operations
  with_prepared_ast { @operations }
end

#path ⇒ Object 



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# File 'lib/graphql/query.rb', line 266

def path
  EmptyObjects::EMPTY_ARRAY
end

#possible_types(type) ⇒ Object 



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# File 'lib/graphql/query.rb', line 388

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

#query? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/query.rb', line 433

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`


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# File 'lib/graphql/query.rb', line 417

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:



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# File 'lib/graphql/query.rb', line 288

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 ⇒ Object 



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

def root_type
  root_type_for_operation(selected_operation.operation_type)
end

#root_type_for_operation(op_type) ⇒ Object 



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# File 'lib/graphql/query.rb', line 392

def root_type_for_operation(op_type)
  case op_type
  when "query", nil
    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 nil, 'query', 'mutation', or 'subscription'"
  end
end

#run_partials(partials_hashes) ⇒ Array<GraphQL::Query::Result>

Run subtree partials of this query and return their results. Each partial is identified with a path: and object: where the path references a field in the AST and the object will be treated as the return value from that field. Subfields of the field named by path will be executed with object as the starting point

Parameters:

  • partials_hashes (Array<Hash{Symbol => Object}>) —

    Hashes with path: and object: keys

Returns:



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

def run_partials(partials_hashes)
  partials = partials_hashes.map { |partial_options| Partial.new(query: self, **partial_options) }
  if context[:__graphql_execute_next]
    Execution::Next.run_all(@schema, partials, context: @context)
  else
    Execution::Interpreter.run_all(@schema, partials, context: @context)
  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.



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

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:



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

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)



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# File 'lib/graphql/query.rb', line 116

def selected_operation_name
  return nil unless selected_operation
  selected_operation.name
end

#static_errors ⇒ Object 



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# File 'lib/graphql/query.rb', line 299

def static_errors
  validation_errors + analysis_errors + context.errors
end

#subscription? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/query.rb', line 437

def subscription?
  with_prepared_ast { @subscription }
end

#subscription_update? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/query.rb', line 229

def subscription_update?
  @subscription_topic && subscription?
end

#types ⇒ Object 



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

def types
  @visibility_profile || warden.visibility_profile
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/query.rb', line 372

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

#validation_pipeline ⇒ Object 



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

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:



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

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)



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

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

#warden ⇒ Object 



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# File 'lib/graphql/query.rb', line 376

def warden
  with_prepared_ast { @warden }
end