-
Notifications
You must be signed in to change notification settings - Fork 2k
/
coerceInputValue.js
221 lines (201 loc) · 5.57 KB
/
coerceInputValue.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
// @flow strict
import { forEach, isCollection } from 'iterall';
import objectValues from '../polyfills/objectValues';
import inspect from '../jsutils/inspect';
import invariant from '../jsutils/invariant';
import didYouMean from '../jsutils/didYouMean';
import isObjectLike from '../jsutils/isObjectLike';
import suggestionList from '../jsutils/suggestionList';
import printPathArray from '../jsutils/printPathArray';
import { type Path, addPath, pathToArray } from '../jsutils/Path';
import { GraphQLError } from '../error/GraphQLError';
import {
type GraphQLInputType,
isScalarType,
isEnumType,
isInputObjectType,
isListType,
isNonNullType,
} from '../type/definition';
type OnErrorCB = (
path: $ReadOnlyArray<string | number>,
invalidValue: mixed,
error: GraphQLError,
) => void;
/**
* Coerces a JavaScript value given a GraphQL Input Type.
*/
export function coerceInputValue(
inputValue: mixed,
type: GraphQLInputType,
onError?: OnErrorCB = defaultOnError,
): mixed {
return coerceInputValueImpl(inputValue, type, onError);
}
function defaultOnError(
path: $ReadOnlyArray<string | number>,
invalidValue: mixed,
error: GraphQLError,
) {
let errorPrefix = 'Invalid value ' + inspect(invalidValue);
if (path.length > 0) {
errorPrefix += ` at "value${printPathArray(path)}": `;
}
error.message = errorPrefix + ': ' + error.message;
throw error;
}
function coerceInputValueImpl(
inputValue: mixed,
type: GraphQLInputType,
onError: OnErrorCB,
path: Path | void,
): mixed {
if (isNonNullType(type)) {
if (inputValue != null) {
return coerceInputValueImpl(inputValue, type.ofType, onError, path);
}
onError(
pathToArray(path),
inputValue,
new GraphQLError(
`Expected non-nullable type "${inspect(type)}" not to be null.`,
),
);
return;
}
if (inputValue == null) {
// Explicitly return the value null.
return null;
}
if (isListType(type)) {
const itemType = type.ofType;
if (isCollection(inputValue)) {
const coercedValue = [];
forEach((inputValue: any), (itemValue, index) => {
coercedValue.push(
coerceInputValueImpl(
itemValue,
itemType,
onError,
addPath(path, index),
),
);
});
return coercedValue;
}
// Lists accept a non-list value as a list of one.
return [coerceInputValueImpl(inputValue, itemType, onError, path)];
}
if (isInputObjectType(type)) {
if (!isObjectLike(inputValue)) {
onError(
pathToArray(path),
inputValue,
new GraphQLError(`Expected type "${type.name}" to be an object.`),
);
return;
}
const coercedValue = {};
const fieldDefs = type.getFields();
for (const field of objectValues(fieldDefs)) {
const fieldValue = inputValue[field.name];
if (fieldValue === undefined) {
if (field.defaultValue !== undefined) {
coercedValue[field.name] = field.defaultValue;
} else if (isNonNullType(field.type)) {
const typeStr = inspect(field.type);
onError(
pathToArray(path),
inputValue,
new GraphQLError(
`Field "${field.name}" of required type "${typeStr}" was not provided.`,
),
);
}
continue;
}
coercedValue[field.name] = coerceInputValueImpl(
fieldValue,
field.type,
onError,
addPath(path, field.name),
);
}
// Ensure every provided field is defined.
for (const fieldName of Object.keys(inputValue)) {
if (!fieldDefs[fieldName]) {
const suggestions = suggestionList(
fieldName,
Object.keys(type.getFields()),
);
onError(
pathToArray(path),
inputValue,
new GraphQLError(
`Field "${fieldName}" is not defined by type "${type.name}".` +
didYouMean(suggestions),
),
);
}
}
return coercedValue;
}
if (isScalarType(type)) {
let parseResult;
// Scalars determine if a input value is valid via parseValue(), which can
// throw to indicate failure. If it throws, maintain a reference to
// the original error.
try {
parseResult = type.parseValue(inputValue);
} catch (error) {
if (error instanceof GraphQLError) {
onError(pathToArray(path), inputValue, error);
} else {
onError(
pathToArray(path),
inputValue,
new GraphQLError(
`Expected type "${type.name}". ` + error.message,
undefined,
undefined,
undefined,
undefined,
error,
),
);
}
return;
}
if (parseResult === undefined) {
onError(
pathToArray(path),
inputValue,
new GraphQLError(`Expected type "${type.name}".`),
);
}
return parseResult;
}
if (isEnumType(type)) {
if (typeof inputValue === 'string') {
const enumValue = type.getValue(inputValue);
if (enumValue) {
return enumValue.value;
}
}
const suggestions = suggestionList(
String(inputValue),
type.getValues().map(enumValue => enumValue.name),
);
onError(
pathToArray(path),
inputValue,
new GraphQLError(
`Expected type "${type.name}".` +
didYouMean('the enum value', suggestions),
),
);
return;
}
// Not reachable. All possible input types have been considered.
invariant(false, 'Unexpected input type: ' + inspect((type: empty)));
}