Class: GraphQL::Execution::Interpreter::Runtime Private
- Inherits:
-
Object
- Object
- GraphQL::Execution::Interpreter::Runtime
- Defined in:
- lib/graphql/execution/interpreter/runtime.rb
Overview
This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.
I think it would be even better if we could somehow make
continue_field
not recursive. “Trampolining” it somehow.
Constant Summary collapse
- HALT =
This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future.
Object.new
Instance Attribute Summary collapse
-
#context ⇒ GraphQL::Query::Context
readonly
private
-
#query ⇒ GraphQL::Query
readonly
private
-
#schema ⇒ Class<GraphQL::Schema>
readonly
private
Instance Method Summary collapse
-
#add_dead_path(path) ⇒ Object
private
Mark
path
as having been permanently nulled out. -
#after_lazy(lazy_obj, owner:, field:, path:, scoped_context:, owner_object:, arguments:, eager: false, trace: true, &block) ⇒ GraphQL::Execution::Lazy, Object
private
If loading
object
will be deferred, it’s a wrapper over it. -
#arguments(graphql_object, arg_owner, ast_node) ⇒ Object
private
-
#authorized_new(type, value, context, path) ⇒ Object
private
-
#continue_field(path, value, field, type, ast_node, next_selections, is_non_null, owner_object, arguments) ⇒ Lazy, ...
private
The resolver for
field
returnedvalue
. -
#continue_value(path, value, field, is_non_null, ast_node) ⇒ Object
private
-
#dead_path?(path) ⇒ Boolean
private
-
#directives_include?(node, graphql_object, parent_type) ⇒ Boolean
private
Check Schema::Directive.include? for each directive that’s present.
-
#evaluate_selections(path, scoped_context, owner_object, owner_type, selections, root_operation_type: nil) ⇒ Object
private
-
#final_value ⇒ Object
private
-
#gather_selections(owner_object, owner_type, selections, selections_by_name) ⇒ Object
private
-
#initialize(query:, response:) ⇒ Runtime
constructor
private
A new instance of Runtime.
-
#inspect ⇒ Object
private
-
#resolve_type(type, value, path) ⇒ Object
private
-
#resolve_with_directives(object, ast_node, &block) ⇒ Object
private
-
#run_directive(object, ast_node, idx, &block) ⇒ Object
private
-
#run_eager ⇒ void
private
This begins the execution.
-
#set_type_at_path(path, type) ⇒ Object
private
-
#type_at(path) ⇒ Object
private
To propagate nulls, we have to know what the field type was at previous parts of the response.
-
#write_execution_errors_in_response(path, errors) ⇒ Object
private
-
#write_in_response(path, value) ⇒ Object
private
-
#write_invalid_null_in_response(path, invalid_null_error) ⇒ Object
private
Constructor Details
#initialize(query:, response:) ⇒ Runtime
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.
Returns a new instance of Runtime.
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# File 'lib/graphql/execution/interpreter/runtime.rb', line 20 def initialize(query:, response:) @query = query @schema = query.schema @context = query.context @interpreter_context = @context.namespace(:interpreter) @response = response @dead_paths = {} @types_at_paths = {} # A cache of { Class => { String => Schema::Field } } # Which assumes that MyObject.get_field("myField") will return the same field # during the lifetime of a query @fields_cache = Hash.new { |h, k| h[k] = {} } end |
Instance Attribute Details
#context ⇒ GraphQL::Query::Context (readonly)
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/execution/interpreter/runtime.rb', line 18 def context @context end |
#query ⇒ GraphQL::Query (readonly)
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/execution/interpreter/runtime.rb', line 12 def query @query end |
#schema ⇒ Class<GraphQL::Schema> (readonly)
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/execution/interpreter/runtime.rb', line 15 def schema @schema end |
Instance Method Details
#add_dead_path(path) ⇒ 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.
Mark path
as having been permanently nulled out.
No values will be added beyond that path.
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# File 'lib/graphql/execution/interpreter/runtime.rb', line 519 def add_dead_path(path) dead = @dead_paths path.each do |part| dead = dead[part] ||= {} end dead[:__dead] = true end |
#after_lazy(lazy_obj, owner:, field:, path:, scoped_context:, owner_object:, arguments:, eager: false, trace: true, &block) ⇒ GraphQL::Execution::Lazy, 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.
Returns If loading object
will be deferred, it’s a wrapper over it.
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# File 'lib/graphql/execution/interpreter/runtime.rb', line 421 def after_lazy(lazy_obj, owner:, field:, path:, scoped_context:, owner_object:, arguments:, eager: false, trace: true, &block) @interpreter_context[:current_object] = owner_object @interpreter_context[:current_arguments] = arguments @interpreter_context[:current_path] = path @interpreter_context[:current_field] = field if schema.lazy?(lazy_obj) lazy = GraphQL::Execution::Lazy.new(path: path, field: field) do @interpreter_context[:current_path] = path @interpreter_context[:current_field] = field @interpreter_context[:current_object] = owner_object @interpreter_context[:current_arguments] = arguments context.scoped_context = scoped_context # Wrap the execution of _this_ method with tracing, # but don't wrap the continuation below inner_obj = begin query.with_error_handling do if trace query.trace("execute_field_lazy", {owner: owner, field: field, path: path, query: query, object: owner_object, arguments: arguments}) do schema.sync_lazy(lazy_obj) end else schema.sync_lazy(lazy_obj) end end rescue GraphQL::ExecutionError, GraphQL::UnauthorizedError => err err end after_lazy(inner_obj, owner: owner, field: field, path: path, scoped_context: context.scoped_context, owner_object: owner_object, arguments: arguments, eager: eager, trace: trace, &block) end if eager lazy.value else write_in_response(path, lazy) lazy end else yield(lazy_obj) end end |
#arguments(graphql_object, arg_owner, ast_node) ⇒ 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/execution/interpreter/runtime.rb', line 462 def arguments(graphql_object, arg_owner, ast_node) # Don't cache arguments if field extras are requested since extras mutate the argument data structure if arg_owner.arguments_statically_coercible? && (!arg_owner.is_a?(GraphQL::Schema::Field) || arg_owner.extras.empty?) query.arguments_for(ast_node, arg_owner) else # The arguments must be prepared in the context of the given object query.arguments_for(ast_node, arg_owner, parent_object: graphql_object) end end |
#authorized_new(type, value, context, path) ⇒ 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/execution/interpreter/runtime.rb', line 558 def (type, value, context, path) trace_payload = { context: context, type: type, object: value, path: path } auth_val = context.query.trace("authorized", trace_payload) do type.(value, context) end if context.schema.lazy?(auth_val) GraphQL::Execution::Lazy.new do context.query.trace("authorized_lazy", trace_payload) do context.schema.sync_lazy(auth_val) end end else auth_val end end |
#continue_field(path, value, field, type, ast_node, next_selections, is_non_null, owner_object, arguments) ⇒ Lazy, ...
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.
The resolver for field
returned value
. Continue to execute the query,
treating value
as type
(probably the return type of the field).
Use next_selections
to resolve object fields, if there are any.
Location information from path
and ast_node
.
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# File 'lib/graphql/execution/interpreter/runtime.rb', line 300 def continue_field(path, value, field, type, ast_node, next_selections, is_non_null, owner_object, arguments) # rubocop:disable Metrics/ParameterLists case type.kind.name when "SCALAR", "ENUM" r = type.coerce_result(value, context) write_in_response(path, r) r when "UNION", "INTERFACE" resolved_type_or_lazy, resolved_value = resolve_type(type, value, path) resolved_value ||= value after_lazy(resolved_type_or_lazy, owner: type, path: path, scoped_context: context.scoped_context, field: field, owner_object: owner_object, arguments: arguments, trace: false) do |resolved_type| possible_types = query.possible_types(type) if !possible_types.include?(resolved_type) parent_type = field.owner err_class = type::UnresolvedTypeError type_error = err_class.new(resolved_value, field, parent_type, resolved_type, possible_types) schema.type_error(type_error, context) write_in_response(path, nil) nil else continue_field(path, resolved_value, field, resolved_type, ast_node, next_selections, is_non_null, owner_object, arguments) end end when "OBJECT" object_proxy = begin (type, value, context, path) rescue GraphQL::ExecutionError => err err end after_lazy(object_proxy, owner: type, path: path, scoped_context: context.scoped_context, field: field, owner_object: owner_object, arguments: arguments, trace: false) do |inner_object| continue_value = continue_value(path, inner_object, field, is_non_null, ast_node) if HALT != continue_value response_hash = {} write_in_response(path, response_hash) evaluate_selections(path, context.scoped_context, continue_value, type, next_selections) response_hash end end when "LIST" response_list = [] write_in_response(path, response_list) inner_type = type.of_type idx = 0 scoped_context = context.scoped_context begin value.each do |inner_value| next_path = path.dup next_path << idx next_path.freeze idx += 1 set_type_at_path(next_path, inner_type) # This will update `response_list` with the lazy after_lazy(inner_value, owner: inner_type, path: next_path, scoped_context: scoped_context, field: field, owner_object: owner_object, arguments: arguments) do |inner_inner_value| continue_value = continue_value(next_path, inner_inner_value, field, inner_type.non_null?, ast_node) if HALT != continue_value continue_field(next_path, continue_value, field, inner_type, ast_node, next_selections, false, owner_object, arguments) end end end rescue NoMethodError => err # Ruby 2.2 doesn't have NoMethodError#receiver, can't check that one in this case. (It's been EOL since 2017.) if err.name == :each && (err.respond_to?(:receiver) ? err.receiver == value : true) # This happens when the GraphQL schema doesn't match the implementation. Help the dev debug. raise ListResultFailedError.new(value: value, field: field, path: path) else # This was some other NoMethodError -- let it bubble to reveal the real error. raise end end response_list when "NON_NULL" inner_type = type.of_type # Don't `set_type_at_path` because we want the static type, # we're going to use that to determine whether a `nil` should be propagated or not. continue_field(path, value, field, inner_type, ast_node, next_selections, true, owner_object, arguments) else raise "Invariant: Unhandled type kind #{type.kind} (#{type})" end end |
#continue_value(path, value, field, is_non_null, ast_node) ⇒ 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/execution/interpreter/runtime.rb', line 254 def continue_value(path, value, field, is_non_null, ast_node) if value.nil? if is_non_null err = field.owner::InvalidNullError.new(field.owner, field, value) write_invalid_null_in_response(path, err) else write_in_response(path, nil) end HALT elsif value.is_a?(GraphQL::ExecutionError) value.path ||= path value.ast_node ||= ast_node write_execution_errors_in_response(path, [value]) HALT elsif value.is_a?(Array) && value.any? && value.all? { |v| v.is_a?(GraphQL::ExecutionError) } value.each_with_index do |error, index| error.ast_node ||= ast_node error.path ||= path + (field.type.list? ? [index] : []) end write_execution_errors_in_response(path, value) HALT elsif value.is_a?(GraphQL::UnauthorizedError) # this hook might raise & crash, or it might return # a replacement value next_value = begin schema.(value) rescue GraphQL::ExecutionError => err err end continue_value(path, next_value, field, is_non_null, ast_node) elsif GraphQL::Execution::Execute::SKIP == value HALT else value end end |
#dead_path?(path) ⇒ Boolean
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/execution/interpreter/runtime.rb', line 527 def dead_path?(path) res = @dead_paths path.each do |part| if res if res[:__dead] break else res = res[part] end end end res && res[:__dead] end |
#directives_include?(node, graphql_object, parent_type) ⇒ Boolean
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.
Check Schema::Directive.include? for each directive that’s present
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# File 'lib/graphql/execution/interpreter/runtime.rb', line 404 def directives_include?(node, graphql_object, parent_type) node.directives.each do |dir_node| dir_defn = schema.directives.fetch(dir_node.name).type_class || raise("Only class-based directives are supported (not #{dir_node.name.inspect})") args = arguments(graphql_object, dir_defn, dir_node).keyword_arguments if !dir_defn.include?(graphql_object, args, context) return false end end true end |
#evaluate_selections(path, scoped_context, owner_object, owner_type, selections, root_operation_type: nil) ⇒ 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/execution/interpreter/runtime.rb', line 119 def evaluate_selections(path, scoped_context, owner_object, owner_type, selections, root_operation_type: nil) @interpreter_context[:current_object] = owner_object @interpreter_context[:current_path] = path selections_by_name = {} gather_selections(owner_object, owner_type, selections, selections_by_name) selections_by_name.each do |result_name, field_ast_nodes_or_ast_node| # As a performance optimization, the hash key will be a `Node` if # there's only one selection of the field. But if there are multiple # selections of the field, it will be an Array of nodes if field_ast_nodes_or_ast_node.is_a?(Array) field_ast_nodes = field_ast_nodes_or_ast_node ast_node = field_ast_nodes.first else field_ast_nodes = nil ast_node = field_ast_nodes_or_ast_node end field_name = ast_node.name field_defn = @fields_cache[owner_type][field_name] ||= owner_type.get_field(field_name) is_introspection = false if field_defn.nil? field_defn = if owner_type == schema.query && (entry_point_field = schema.introspection_system.entry_point(name: field_name)) is_introspection = true entry_point_field elsif (dynamic_field = schema.introspection_system.dynamic_field(name: field_name)) is_introspection = true dynamic_field else raise "Invariant: no field for #{owner_type}.#{field_name}" end end return_type = field_defn.type next_path = path.dup next_path << result_name next_path.freeze # This seems janky, but we need to know # the field's return type at this path in order # to propagate `null` set_type_at_path(next_path, return_type) # Set this before calling `run_with_directives`, so that the directive can have the latest path @interpreter_context[:current_path] = next_path @interpreter_context[:current_field] = field_defn context.scoped_context = scoped_context object = owner_object if is_introspection object = (field_defn.owner, object, context, next_path) end begin kwarg_arguments = arguments(object, field_defn, ast_node) rescue GraphQL::ExecutionError => e continue_value(next_path, e, field_defn, return_type.non_null?, ast_node) next end after_lazy(kwarg_arguments, owner: owner_type, field: field_defn, path: next_path, scoped_context: context.scoped_context, owner_object: object, arguments: kwarg_arguments) do |resolved_arguments| if resolved_arguments.is_a? GraphQL::ExecutionError continue_value(next_path, resolved_arguments, field_defn, return_type.non_null?, ast_node) next end kwarg_arguments = resolved_arguments.keyword_arguments field_defn.extras.each do |extra| case extra when :ast_node kwarg_arguments[:ast_node] = ast_node when :execution_errors kwarg_arguments[:execution_errors] = ExecutionErrors.new(context, ast_node, next_path) when :path kwarg_arguments[:path] = next_path when :lookahead if !field_ast_nodes field_ast_nodes = [ast_node] end kwarg_arguments[:lookahead] = Execution::Lookahead.new( query: query, ast_nodes: field_ast_nodes, field: field_defn, ) when :argument_details kwarg_arguments[:argument_details] = resolved_arguments else kwarg_arguments[extra] = field_defn.fetch_extra(extra, context) end end @interpreter_context[:current_arguments] = kwarg_arguments # Optimize for the case that field is selected only once if field_ast_nodes.nil? || field_ast_nodes.size == 1 next_selections = ast_node.selections else next_selections = [] field_ast_nodes.each { |f| next_selections.concat(f.selections) } end field_result = resolve_with_directives(object, ast_node) do # Actually call the field resolver and capture the result app_result = begin query.with_error_handling do query.trace("execute_field", {owner: owner_type, field: field_defn, path: next_path, query: query, object: object, arguments: kwarg_arguments}) do field_defn.resolve(object, kwarg_arguments, context) end end rescue GraphQL::ExecutionError => err err end after_lazy(app_result, owner: owner_type, field: field_defn, path: next_path, scoped_context: context.scoped_context, owner_object: object, arguments: kwarg_arguments) do |inner_result| continue_value = continue_value(next_path, inner_result, field_defn, return_type.non_null?, ast_node) if RawValue === continue_value # Write raw value directly to the response without resolving nested objects write_in_response(next_path, continue_value.resolve) elsif HALT != continue_value continue_field(next_path, continue_value, field_defn, return_type, ast_node, next_selections, false, object, kwarg_arguments) end end end # If this field is a root mutation field, immediately resolve # all of its child fields before moving on to the next root mutation field. # (Subselections of this mutation will still be resolved level-by-level.) if root_operation_type == "mutation" Interpreter::Resolve.resolve_all([field_result]) else field_result end end end end |
#final_value ⇒ 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/execution/interpreter/runtime.rb', line 34 def final_value @response.final_value end |
#gather_selections(owner_object, owner_type, selections, selections_by_name) ⇒ 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/execution/interpreter/runtime.rb', line 65 def gather_selections(owner_object, owner_type, selections, selections_by_name) selections.each do |node| # Skip gathering this if the directive says so if !directives_include?(node, owner_object, owner_type) next end case node when GraphQL::Language::Nodes::Field response_key = node.alias || node.name selections = selections_by_name[response_key] # if there was already a selection of this field, # use an array to hold all selections, # otherise, use the single node to represent the selection if selections # This field was already selected at least once, # add this node to the list of selections s = Array(selections) s << node selections_by_name[response_key] = s else # No selection was found for this field yet selections_by_name[response_key] = node end when GraphQL::Language::Nodes::InlineFragment if node.type type_defn = schema.get_type(node.type.name) # Faster than .map{}.include?() query.warden.possible_types(type_defn).each do |t| if t == owner_type gather_selections(owner_object, owner_type, node.selections, selections_by_name) break end end else # it's an untyped fragment, definitely continue gather_selections(owner_object, owner_type, node.selections, selections_by_name) end when GraphQL::Language::Nodes::FragmentSpread fragment_def = query.fragments[node.name] type_defn = schema.get_type(fragment_def.type.name) possible_types = query.warden.possible_types(type_defn) possible_types.each do |t| if t == owner_type gather_selections(owner_object, owner_type, fragment_def.selections, selections_by_name) break end end else raise "Invariant: unexpected selection class: #{node.class}" end end end |
#inspect ⇒ 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/execution/interpreter/runtime.rb', line 38 def inspect "#<#{self.class.name} response=#{@response.inspect}>" end |
#resolve_type(type, value, path) ⇒ 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/execution/interpreter/runtime.rb', line 541 def resolve_type(type, value, path) trace_payload = { context: context, type: type, object: value, path: path } resolved_type, resolved_value = query.trace("resolve_type", trace_payload) do query.resolve_type(type, value) end if schema.lazy?(resolved_type) GraphQL::Execution::Lazy.new do query.trace("resolve_type_lazy", trace_payload) do schema.sync_lazy(resolved_type) end end else [resolved_type, resolved_value] end end |
#resolve_with_directives(object, ast_node, &block) ⇒ 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/execution/interpreter/runtime.rb', line 382 def resolve_with_directives(object, ast_node, &block) return yield if ast_node.directives.empty? run_directive(object, ast_node, 0, &block) end |
#run_directive(object, ast_node, idx, &block) ⇒ 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/execution/interpreter/runtime.rb', line 387 def run_directive(object, ast_node, idx, &block) dir_node = ast_node.directives[idx] if !dir_node yield else dir_defn = schema.directives.fetch(dir_node.name) if !dir_defn.is_a?(Class) dir_defn = dir_defn.type_class || raise("Only class-based directives are supported (not `@#{dir_node.name}`)") end dir_args = arguments(nil, dir_defn, dir_node).keyword_arguments dir_defn.resolve(object, dir_args, context) do run_directive(object, ast_node, idx + 1, &block) end end end |
#run_eager ⇒ void
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.
This method returns an undefined value.
This begins the execution. Some deferred work might be stored up in lazies.
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# File 'lib/graphql/execution/interpreter/runtime.rb', line 45 def run_eager root_operation = query.selected_operation root_op_type = root_operation.operation_type || "query" root_type = schema.root_type_for_operation(root_op_type) path = [] @interpreter_context[:current_object] = query.root_value @interpreter_context[:current_path] = path object_proxy = (root_type, query.root_value, context, path) object_proxy = schema.sync_lazy(object_proxy) if object_proxy.nil? # Root .authorized? returned false. write_in_response(path, nil) nil else evaluate_selections(path, context.scoped_context, object_proxy, root_type, root_operation.selections, root_operation_type: root_op_type) nil end end |
#set_type_at_path(path, type) ⇒ 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/execution/interpreter/runtime.rb', line 512 def set_type_at_path(path, type) @types_at_paths[path] = type nil end |
#type_at(path) ⇒ 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.
To propagate nulls, we have to know what the field type was at previous parts of the response. This hash matches the response
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# File 'lib/graphql/execution/interpreter/runtime.rb', line 508 def type_at(path) @types_at_paths.fetch(path) end |
#write_execution_errors_in_response(path, errors) ⇒ 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/execution/interpreter/runtime.rb', line 480 def write_execution_errors_in_response(path, errors) if !dead_path?(path) errors.each do |v| context.errors << v end write_in_response(path, nil) add_dead_path(path) end end |
#write_in_response(path, value) ⇒ 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/execution/interpreter/runtime.rb', line 490 def write_in_response(path, value) if dead_path?(path) return else if value.nil? && path.any? && type_at(path).non_null? # This nil is invalid, try writing it at the previous spot propagate_path = path[0..-2] write_in_response(propagate_path, value) add_dead_path(propagate_path) else @response.write(path, value) end end end |
#write_invalid_null_in_response(path, invalid_null_error) ⇒ 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/execution/interpreter/runtime.rb', line 472 def write_invalid_null_in_response(path, invalid_null_error) if !dead_path?(path) schema.type_error(invalid_null_error, context) write_in_response(path, nil) add_dead_path(path) end end |