コード例 #1
0
ファイル: executor.go プロジェクト: housinganywhere/graphql
func Execute(p ExecuteParams) (result *Result) {
	result = &Result{}

	exeContext, err := buildExecutionContext(BuildExecutionCtxParams{
		Schema:        p.Schema,
		Root:          p.Root,
		AST:           p.AST,
		OperationName: p.OperationName,
		Args:          p.Args,
		Errors:        nil,
		Result:        result,
		Context:       p.Context,
	})

	if err != nil {
		result.Errors = append(result.Errors, gqlerrors.FormatError(err))
		return
	}

	defer func() {
		if r := recover(); r != nil {
			var err error
			if r, ok := r.(error); ok {
				err = gqlerrors.FormatError(r)
			}
			exeContext.Errors = append(exeContext.Errors, gqlerrors.FormatError(err))
			result.Errors = exeContext.Errors
		}
	}()

	return executeOperation(ExecuteOperationParams{
		ExecutionContext: exeContext,
		Root:             p.Root,
		Operation:        exeContext.Operation,
	})
}
コード例 #2
0
ファイル: executor.go プロジェクト: housinganywhere/graphql
// completeListValue complete a list value by completing each item in the list with the inner type
func completeListValue(eCtx *ExecutionContext, returnType *List, fieldASTs []*ast.Field, info ResolveInfo, result interface{}) interface{} {
	resultVal := reflect.ValueOf(result)
	parentTypeName := ""
	if info.ParentType != nil {
		parentTypeName = info.ParentType.Name()
	}
	err := invariant(
		resultVal.IsValid() && resultVal.Type().Kind() == reflect.Slice,
		fmt.Sprintf("User Error: expected iterable, but did not find one "+
			"for field %v.%v.", parentTypeName, info.FieldName),
	)
	if err != nil {
		panic(gqlerrors.FormatError(err))
	}

	itemType := returnType.OfType
	completedResults := []interface{}{}
	for i := 0; i < resultVal.Len(); i++ {
		val := resultVal.Index(i).Interface()
		completedItem := completeValueCatchingError(eCtx, itemType, fieldASTs, info, val)
		completedResults = append(completedResults, completedItem)
	}
	return completedResults
}
コード例 #3
0
ファイル: validator.go プロジェクト: housinganywhere/graphql
func (ctx *ValidationContext) ReportError(err error) {
	formattedErr := gqlerrors.FormatError(err)
	ctx.errors = append(ctx.errors, formattedErr)
}
コード例 #4
0
ファイル: executor.go プロジェクト: housinganywhere/graphql
func completeValue(eCtx *ExecutionContext, returnType Type, fieldASTs []*ast.Field, info ResolveInfo, result interface{}) interface{} {

	resultVal := reflect.ValueOf(result)
	if resultVal.IsValid() && resultVal.Type().Kind() == reflect.Func {
		if propertyFn, ok := result.(func() interface{}); ok {
			return propertyFn()
		}
		err := gqlerrors.NewFormattedError("Error resolving func. Expected `func() interface{}` signature")
		panic(gqlerrors.FormatError(err))
	}

	// If field type is NonNull, complete for inner type, and throw field error
	// if result is null.
	if returnType, ok := returnType.(*NonNull); ok {
		completed := completeValue(eCtx, returnType.OfType, fieldASTs, info, result)
		if completed == nil {
			err := NewLocatedError(
				fmt.Sprintf("Cannot return null for non-nullable field %v.%v.", info.ParentType, info.FieldName),
				FieldASTsToNodeASTs(fieldASTs),
			)
			panic(gqlerrors.FormatError(err))
		}
		return completed
	}

	// If result value is null-ish (null, undefined, or NaN) then return null.
	if isNullish(result) {
		return nil
	}

	// If field type is List, complete each item in the list with the inner type
	if returnType, ok := returnType.(*List); ok {
		return completeListValue(eCtx, returnType, fieldASTs, info, result)
	}

	// If field type is a leaf type, Scalar or Enum, serialize to a valid value,
	// returning null if serialization is not possible.
	if returnType, ok := returnType.(*Scalar); ok {
		return completeLeafValue(returnType, result)
	}
	if returnType, ok := returnType.(*Enum); ok {
		return completeLeafValue(returnType, result)
	}

	// If field type is an abstract type, Interface or Union, determine the
	// runtime Object type and complete for that type.
	if returnType, ok := returnType.(*Union); ok {
		return completeAbstractValue(eCtx, returnType, fieldASTs, info, result)
	}
	if returnType, ok := returnType.(*Interface); ok {
		return completeAbstractValue(eCtx, returnType, fieldASTs, info, result)
	}

	// If field type is Object, execute and complete all sub-selections.
	if returnType, ok := returnType.(*Object); ok {
		return completeObjectValue(eCtx, returnType, fieldASTs, info, result)
	}

	// Not reachable. All possible output types have been considered.
	err := invariant(false,
		fmt.Sprintf(`Cannot complete value of unexpected type "%v."`, returnType),
	)
	if err != nil {
		panic(gqlerrors.FormatError(err))
	}
	return nil
}
コード例 #5
0
ファイル: executor.go プロジェクト: housinganywhere/graphql
// Resolves the field on the given source object. In particular, this
// figures out the value that the field returns by calling its resolve function,
// then calls completeValue to complete promises, serialize scalars, or execute
// the sub-selection-set for objects.
func resolveField(eCtx *ExecutionContext, parentType *Object, source interface{}, fieldASTs []*ast.Field) (result interface{}, resultState resolveFieldResultState) {
	// catch panic from resolveFn
	var returnType Output
	defer func() (interface{}, resolveFieldResultState) {
		if r := recover(); r != nil {

			var err error
			if r, ok := r.(string); ok {
				err = NewLocatedError(
					fmt.Sprintf("%v", r),
					FieldASTsToNodeASTs(fieldASTs),
				)
			}
			if r, ok := r.(error); ok {
				err = gqlerrors.FormatError(r)
			}
			// send panic upstream
			if _, ok := returnType.(*NonNull); ok {
				panic(gqlerrors.FormatError(err))
			}
			eCtx.Errors = append(eCtx.Errors, gqlerrors.FormatError(err))
			return result, resultState
		}
		return result, resultState
	}()

	fieldAST := fieldASTs[0]
	fieldName := ""
	if fieldAST.Name != nil {
		fieldName = fieldAST.Name.Value
	}

	fieldDef := getFieldDef(eCtx.Schema, parentType, fieldName)
	if fieldDef == nil {
		resultState.hasNoFieldDefs = true
		return nil, resultState
	}
	returnType = fieldDef.Type
	resolveFn := fieldDef.Resolve
	if resolveFn == nil {
		resolveFn = DefaultResolveFn
	}

	// Build a map of arguments from the field.arguments AST, using the
	// variables scope to fulfill any variable references.
	// TODO: find a way to memoize, in case this field is within a List type.
	args, _ := getArgumentValues(fieldDef.Args, fieldAST.Arguments, eCtx.VariableValues)

	info := ResolveInfo{
		FieldName:      fieldName,
		FieldASTs:      fieldASTs,
		ReturnType:     returnType,
		ParentType:     parentType,
		Schema:         eCtx.Schema,
		Fragments:      eCtx.Fragments,
		RootValue:      eCtx.Root,
		Operation:      eCtx.Operation,
		VariableValues: eCtx.VariableValues,
	}

	var resolveFnError error

	result, resolveFnError = resolveFn(ResolveParams{
		Source:  source,
		Args:    args,
		Info:    info,
		Context: eCtx.Context,
	})

	if resolveFnError != nil {
		panic(gqlerrors.FormatError(resolveFnError))
	}

	completed := completeValueCatchingError(eCtx, returnType, fieldASTs, info, result)
	return completed, resultState
}