58 lines
1.8 KiB
JavaScript
58 lines
1.8 KiB
JavaScript
import { inspect } from '../../jsutils/inspect.mjs';
|
|
import { GraphQLError } from '../../error/GraphQLError.mjs';
|
|
import { getNamedType, isLeafType } from '../../type/definition.mjs';
|
|
|
|
/**
|
|
* Scalar leafs
|
|
*
|
|
* A GraphQL document is valid only if all leaf fields (fields without
|
|
* sub selections) are of scalar or enum types.
|
|
*/
|
|
export function ScalarLeafsRule(context) {
|
|
return {
|
|
Field(node) {
|
|
const type = context.getType();
|
|
const selectionSet = node.selectionSet;
|
|
|
|
if (type) {
|
|
if (isLeafType(getNamedType(type))) {
|
|
if (selectionSet) {
|
|
const fieldName = node.name.value;
|
|
const typeStr = inspect(type);
|
|
context.reportError(
|
|
new GraphQLError(
|
|
`Field "${fieldName}" must not have a selection since type "${typeStr}" has no subfields.`,
|
|
{
|
|
nodes: selectionSet,
|
|
},
|
|
),
|
|
);
|
|
}
|
|
} else if (!selectionSet) {
|
|
const fieldName = node.name.value;
|
|
const typeStr = inspect(type);
|
|
context.reportError(
|
|
new GraphQLError(
|
|
`Field "${fieldName}" of type "${typeStr}" must have a selection of subfields. Did you mean "${fieldName} { ... }"?`,
|
|
{
|
|
nodes: node,
|
|
},
|
|
),
|
|
);
|
|
} else if (selectionSet.selections.length === 0) {
|
|
const fieldName = node.name.value;
|
|
const typeStr = inspect(type);
|
|
context.reportError(
|
|
new GraphQLError(
|
|
`Field "${fieldName}" of type "${typeStr}" must have at least one field selected.`,
|
|
{
|
|
nodes: node,
|
|
},
|
|
),
|
|
);
|
|
}
|
|
}
|
|
},
|
|
};
|
|
}
|