src/Executor/Values.php
protected static function coerceValueAST(TypeInterface $type, $ast, $variables = NULL)
    {
        if ($type instanceof NonNullModifier) {
            // Note: we're not checking that the result of coerceValueAST is non-null.
            // We're assuming that this query has been validated and the value used
            // here is of the correct type.
            return self::coerceValueAST($type->getWrappedType(), $ast, $variables);
        }

        if (!$ast) {
            return NULL;
        }

        if ($ast::KIND === Node::KIND_VARIABLE) {
            $variableName = $ast->get('name')->get('value');

            if (!isset($variables, $variables[$variableName])) {
                return NULL;
            }

            // Note: we're not doing any checking that this variable is correct. We're
            // assuming that this query has been validated and the variable usage here
            // is of the correct type.
            return $variables[$variableName];
        }

        if ($type instanceof ListModifier) {
            $itemType = $type->getWrappedType();

            if ($ast::KIND === Node::KIND_ARRAY_VALUE) {
                $tmp = [];
                foreach ($ast->get('values') as $itemAST) {
                    $tmp[] = self::coerceValueAST($itemType, $itemAST, $variables);
                }

                return $tmp;
            } else {
                return [self::coerceValueAST($itemType, $ast, $variables)];
            }
        }

        if ($type instanceof InputObjectType) {
            $fields = $type->getFields();

            if ($ast::KIND !== Node::KIND_OBJECT_VALUE) {
                return NULL;
            }

            $asts = array_reduce($ast->get('fields'), function ($carry, $field) {
                $carry[$field->get('name')->get('value')] = $field;
                return $carry;
            }, []);

            $object = [];
            foreach ($fields as $name => $item) {
                $field = $asts[$name];
                $fieldValue = self::coerceValueAST($item->getType(), $field ? $field->get('value') : NULL, $variables);
                $object[$name] = $fieldValue === NULL ? $item->getDefaultValue() : $fieldValue;
            }

            return $object;
        }

        if ($type instanceof ScalarType || $type instanceof EnumType) {
            $coerced = $type->coerceLiteral($ast);

            if (isset($coerced)) {
                return $coerced;
            }
        }

        return NULL;
    }
protected static function coerceValueAST(TypeInterface $type, $ast, $variables = NULL)
    {
        if ($type instanceof NonNullModifier) {
            // Note: we're not checking that the result of coerceValueAST is non-null.
            // We're assuming that this query has been validated and the value used
            // here is of the correct type.
            return self::coerceValueAST($type->getWrappedType(), $ast, $variables);
        }

        if (!$ast) {
            return NULL;
        }

        if ($ast::KIND === Node::KIND_VARIABLE) {
            $variableName = $ast->get('name')->get('value');

            if (!isset($variables, $variables[$variableName])) {
                return NULL;
            }

            // Note: we're not doing any checking that this variable is correct. We're
            // assuming that this query has been validated and the variable usage here
            // is of the correct type.
            return $variables[$variableName];
        }

        if ($type instanceof ListModifier) {
            $itemType = $type->getWrappedType();

            if ($ast::KIND === Node::KIND_ARRAY_VALUE) {
                $tmp = [];
                foreach ($ast->get('values') as $itemAST) {
                    $tmp[] = self::coerceValueAST($itemType, $itemAST, $variables);
                }

                return $tmp;
            } else {
                return [self::coerceValueAST($itemType, $ast, $variables)];
            }
        }

        if ($type instanceof InputObjectType) {
            $fields = $type->getFields();

            if ($ast::KIND !== Node::KIND_OBJECT_VALUE) {
                return NULL;
            }

            $asts = array_reduce($ast->get('fields'), function ($carry, $field) {
                $carry[$field->get('name')->get('value')] = $field;
                return $carry;
            }, []);

            $object = [];
            foreach ($fields as $name => $item) {
                $field = $asts[$name];
                $fieldValue = self::coerceValueAST($item->getType(), $field ? $field->get('value') : NULL, $variables);
                $object[$name] = $fieldValue === NULL ? $item->getDefaultValue() : $fieldValue;
            }

            return $object;
        }

        if ($type instanceof ScalarType || $type instanceof EnumType) {
            $coerced = $type->coerceLiteral($ast);

            if (isset($coerced)) {
                return $coerced;
            }
        }

        return NULL;
    }
protected static function coerceValueAST ( TypeInterface $ type , $ ast , $ variables = NULL ) { if ( $ type instanceof NonNullModifier ) { // Note: we're not checking that the result of coerceValueAST is non-null. // We're assuming that this query has been validated and the value used // here is of the correct type. return self :: coerceValueAST ( $ type -> getWrappedType ( ) , $ ast , $ variables ) ; } if ( ! $ ast ) { return NULL ; } if ( $ ast :: KIND === Node :: KIND_VARIABLE ) { $ variableName = $ ast -> get ( 'name' ) -> get ( 'value' ) ; if ( ! isset ( $ variables , $ variables [ $ variableName ] ) ) { return NULL ; } // Note: we're not doing any checking that this variable is correct. We're // assuming that this query has been validated and the variable usage here // is of the correct type. return $ variables [ $ variableName ] ; } if ( $ type instanceof ListModifier ) { $ itemType = $ type -> getWrappedType ( ) ; if ( $ ast :: KIND === Node :: KIND_ARRAY_VALUE ) { $ tmp = [ ] ; foreach ( $ ast -> get ( 'values' ) as $ itemAST ) { $ tmp [ ] = self :: coerceValueAST ( $ itemType , $ itemAST , $ variables ) ; } return $ tmp ; } else { return [ self :: coerceValueAST ( $ itemType , $ ast , $ variables ) ] ; } } if ( $ type instanceof InputObjectType ) { $ fields = $ type -> getFields ( ) ; if ( $ ast :: KIND !== Node :: KIND_OBJECT_VALUE ) { return NULL ; } $ asts = array_reduce ( $ ast -> get ( 'fields' ) , function ( $ carry , $ field ) { $ carry [ $ field -> get ( 'name' ) -> get ( 'value' ) ] = $ field ; return $ carry ; } , [ ] ) ; $ object = [ ] ; foreach ( $ fields as $ name => $ item ) { $ field = $ asts [ $ name ] ; $ fieldValue = self :: coerceValueAST ( $ item -> getType ( ) , $ field ? $ field -> get ( 'value' ) : NULL , $ variables ) ; $ object [ $ name ] = $ fieldValue === NULL ? $ item -> getDefaultValue ( ) : $ fieldValue ; } return $ object ; } if ( $ type instanceof ScalarType || $ type instanceof EnumType ) { $ coerced = $ type -> coerceLiteral ( $ ast ) ; if ( isset ( $ coerced ) ) { return $ coerced ; } } return NULL ; }
Given a type and a value AST node known to match this type, build a
runtime value.

@param TypeInterface $type
@param $ast
@param null $variables

@return array|mixed|null|string
Given a type and a value AST node known to match this type build a runtime value .