|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types=1); |
|
4
|
|
|
|
|
5
|
|
|
namespace GraphQL\Validator\Rules; |
|
6
|
|
|
|
|
7
|
|
|
use GraphQL\Error\Error; |
|
8
|
|
|
use GraphQL\Language\AST\FragmentSpreadNode; |
|
9
|
|
|
use GraphQL\Language\AST\InlineFragmentNode; |
|
10
|
|
|
use GraphQL\Language\AST\NodeKind; |
|
11
|
|
|
use GraphQL\Type\Definition\AbstractType; |
|
12
|
|
|
use GraphQL\Type\Definition\CompositeType; |
|
13
|
|
|
use GraphQL\Type\Definition\InterfaceType; |
|
14
|
|
|
use GraphQL\Type\Definition\ObjectType; |
|
15
|
|
|
use GraphQL\Type\Definition\UnionType; |
|
16
|
|
|
use GraphQL\Type\Schema; |
|
17
|
|
|
use GraphQL\Utils\TypeInfo; |
|
18
|
|
|
use GraphQL\Validator\ValidationContext; |
|
19
|
|
|
use function sprintf; |
|
20
|
|
|
|
|
21
|
|
|
class PossibleFragmentSpreads extends ValidationRule |
|
22
|
|
|
{ |
|
23
|
142 |
|
public function getVisitor(ValidationContext $context) |
|
24
|
|
|
{ |
|
25
|
|
|
return [ |
|
26
|
|
|
NodeKind::INLINE_FRAGMENT => function (InlineFragmentNode $node) use ($context) { |
|
27
|
26 |
|
$fragType = $context->getType(); |
|
28
|
26 |
|
$parentType = $context->getParentType(); |
|
29
|
|
|
|
|
30
|
26 |
|
if (! ($fragType instanceof CompositeType) || |
|
31
|
26 |
|
! ($parentType instanceof CompositeType) || |
|
32
|
26 |
|
$this->doTypesOverlap($context->getSchema(), $fragType, $parentType)) { |
|
33
|
25 |
|
return; |
|
34
|
|
|
} |
|
35
|
|
|
|
|
36
|
1 |
|
$context->reportError(new Error( |
|
37
|
1 |
|
self::typeIncompatibleAnonSpreadMessage($parentType, $fragType), |
|
38
|
1 |
|
[$node] |
|
39
|
|
|
)); |
|
40
|
142 |
|
}, |
|
41
|
|
|
NodeKind::FRAGMENT_SPREAD => function (FragmentSpreadNode $node) use ($context) { |
|
42
|
32 |
|
$fragName = $node->name->value; |
|
43
|
32 |
|
$fragType = $this->getFragmentType($context, $fragName); |
|
44
|
32 |
|
$parentType = $context->getParentType(); |
|
45
|
|
|
|
|
46
|
32 |
|
if (! $fragType || |
|
47
|
31 |
|
! $parentType || |
|
48
|
32 |
|
$this->doTypesOverlap($context->getSchema(), $fragType, $parentType) |
|
49
|
|
|
) { |
|
50
|
24 |
|
return; |
|
51
|
|
|
} |
|
52
|
|
|
|
|
53
|
8 |
|
$context->reportError(new Error( |
|
54
|
8 |
|
self::typeIncompatibleSpreadMessage($fragName, $parentType, $fragType), |
|
55
|
8 |
|
[$node] |
|
56
|
|
|
)); |
|
57
|
142 |
|
}, |
|
58
|
|
|
]; |
|
59
|
|
|
} |
|
60
|
|
|
|
|
61
|
51 |
|
private function doTypesOverlap(Schema $schema, CompositeType $fragType, CompositeType $parentType) |
|
62
|
|
|
{ |
|
63
|
|
|
// Checking in the order of the most frequently used scenarios: |
|
64
|
|
|
// Parent type === fragment type |
|
65
|
51 |
|
if ($parentType === $fragType) { |
|
66
|
12 |
|
return true; |
|
67
|
|
|
} |
|
68
|
|
|
|
|
69
|
|
|
// Parent type is interface or union, fragment type is object type |
|
70
|
39 |
|
if ($parentType instanceof AbstractType && $fragType instanceof ObjectType) { |
|
71
|
23 |
|
return $schema->isPossibleType($parentType, $fragType); |
|
72
|
|
|
} |
|
73
|
|
|
|
|
74
|
|
|
// Parent type is object type, fragment type is interface (or rather rare - union) |
|
75
|
16 |
|
if ($parentType instanceof ObjectType && $fragType instanceof AbstractType) { |
|
76
|
4 |
|
return $schema->isPossibleType($fragType, $parentType); |
|
77
|
|
|
} |
|
78
|
|
|
|
|
79
|
|
|
// Both are object types: |
|
80
|
12 |
|
if ($parentType instanceof ObjectType && $fragType instanceof ObjectType) { |
|
81
|
2 |
|
return $parentType === $fragType; |
|
82
|
|
|
} |
|
83
|
|
|
|
|
84
|
|
|
// Both are interfaces |
|
85
|
|
|
// This case may be assumed valid only when implementations of two interfaces intersect |
|
86
|
|
|
// But we don't have information about all implementations at runtime |
|
87
|
|
|
// (getting this information via $schema->getPossibleTypes() requires scanning through whole schema |
|
88
|
|
|
// which is very costly to do at each request due to PHP "shared nothing" architecture) |
|
89
|
|
|
// |
|
90
|
|
|
// So in this case we just make it pass - invalid fragment spreads will be simply ignored during execution |
|
91
|
|
|
// See also https://github.com/webonyx/graphql-php/issues/69#issuecomment-283954602 |
|
92
|
10 |
|
if ($parentType instanceof InterfaceType && $fragType instanceof InterfaceType) { |
|
93
|
4 |
|
return true; |
|
94
|
|
|
|
|
95
|
|
|
// Note that there is one case when we do have information about all implementations: |
|
96
|
|
|
// When schema descriptor is defined ($schema->hasDescriptor()) |
|
97
|
|
|
// BUT we must avoid situation when some query that worked in development had suddenly stopped |
|
98
|
|
|
// working in production. So staying consistent and always validate. |
|
99
|
|
|
} |
|
100
|
|
|
|
|
101
|
|
|
// Interface within union |
|
102
|
6 |
|
if ($parentType instanceof UnionType && $fragType instanceof InterfaceType) { |
|
103
|
2 |
|
foreach ($parentType->getTypes() as $type) { |
|
104
|
2 |
|
if ($type->implementsInterface($fragType)) { |
|
105
|
2 |
|
return true; |
|
106
|
|
|
} |
|
107
|
|
|
} |
|
108
|
|
|
} |
|
109
|
|
|
|
|
110
|
5 |
|
if ($parentType instanceof InterfaceType && $fragType instanceof UnionType) { |
|
111
|
2 |
|
foreach ($fragType->getTypes() as $type) { |
|
112
|
2 |
|
if ($type->implementsInterface($parentType)) { |
|
113
|
2 |
|
return true; |
|
114
|
|
|
} |
|
115
|
|
|
} |
|
116
|
|
|
} |
|
117
|
|
|
|
|
118
|
4 |
|
if ($parentType instanceof UnionType && $fragType instanceof UnionType) { |
|
119
|
2 |
|
foreach ($fragType->getTypes() as $type) { |
|
120
|
2 |
|
if ($parentType->isPossibleType($type)) { |
|
121
|
2 |
|
return true; |
|
122
|
|
|
} |
|
123
|
|
|
} |
|
124
|
|
|
} |
|
125
|
|
|
|
|
126
|
3 |
|
return false; |
|
127
|
|
|
} |
|
128
|
|
|
|
|
129
|
1 |
|
public static function typeIncompatibleAnonSpreadMessage($parentType, $fragType) |
|
130
|
|
|
{ |
|
131
|
1 |
|
return sprintf( |
|
132
|
1 |
|
'Fragment cannot be spread here as objects of type "%s" can never be of type "%s".', |
|
133
|
1 |
|
$parentType, |
|
134
|
1 |
|
$fragType |
|
135
|
|
|
); |
|
136
|
|
|
} |
|
137
|
|
|
|
|
138
|
32 |
|
private function getFragmentType(ValidationContext $context, $name) |
|
139
|
|
|
{ |
|
140
|
32 |
|
$frag = $context->getFragment($name); |
|
141
|
32 |
|
if ($frag) { |
|
142
|
32 |
|
$type = TypeInfo::typeFromAST($context->getSchema(), $frag->typeCondition); |
|
143
|
32 |
|
if ($type instanceof CompositeType) { |
|
144
|
31 |
|
return $type; |
|
145
|
|
|
} |
|
146
|
|
|
} |
|
147
|
|
|
|
|
148
|
1 |
|
return null; |
|
149
|
|
|
} |
|
150
|
|
|
|
|
151
|
8 |
|
public static function typeIncompatibleSpreadMessage($fragName, $parentType, $fragType) |
|
152
|
|
|
{ |
|
153
|
8 |
|
return sprintf( |
|
154
|
8 |
|
'Fragment "%s" cannot be spread here as objects of type "%s" can never be of type "%s".', |
|
155
|
8 |
|
$fragName, |
|
156
|
8 |
|
$parentType, |
|
157
|
8 |
|
$fragType |
|
158
|
|
|
); |
|
159
|
|
|
} |
|
160
|
|
|
} |
|
161
|
|
|
|
simPod /
graphql-php
