问题
I am using this endpoint:
@PostMapping("graphql")
public ResponseEntity<Object> getResource(@RequestBody Object query) { // String query
ExecutionResult result;
if (query instanceof String) {
result = graphQL.execute(query.toString()); // if plain text
} else{
String queryString = ((HashMap) query).get("query").toString();
Object variables = ((HashMap) query).get("variables");
ExecutionInput input = ExecutionInput.newExecutionInput()
.query(queryString)
.variables((Map<String, Object>) variables) // "var1" -> "test1"
.build();
result = graphQL.execute(input);
}
return new ResponseEntity<Object>(result, HttpStatus.OK);
}
When i don't have variable it works fine:
query {
getItem(dictionaryType: "test1") {
code
name
description
}
}
When i add variable
it starts to fail, see here:
query {
getItem(dictionaryType: $var1) {
code
name
description
}
}
In my schema
i have defined the query
section as followed:
type Query {
getItem(dictionaryType: String): TestEntity
}
In java
code:
@Value("classpath:test.graphqls")
private Resource schemaResource;
private GraphQL graphQL;
@PostConstruct
private void loadSchema() throws IOException {
File schemaFile = schemaResource.getFile();
TypeDefinitionRegistry registry = new SchemaParser().parse(schemaFile);
RuntimeWiring wiring = buildWiring();
GraphQLSchema schema = new SchemaGenerator().makeExecutableSchema(registry, wiring);
graphQL = GraphQL.newGraphQL(schema).build();
}
private RuntimeWiring buildWiring() {
initializeFetchers();
return RuntimeWiring.newRuntimeWiring()
.type("Query", typeWriting -> typeWriting
.dataFetcher("getItem", dictionaryItemFetcher)
)
.build();
}
private void initializeFetchers() {
dictionaryItemFetcher = dataFetchingEnvironment ->
dictionaryService.getDictionaryItemsFirstAsString(dataFetchingEnvironment.getArgument("dictionaryType"));
}
回答1:
Any variables used inside an operation must be declared as part of the operation definition, like this:
query OptionalButRecommendedQueryName ($var1: String) {
getItem(dictionaryType: $var1) {
code
name
description
}
}
This allows GraphQL to validate your variables against the provided type, and also validate that the variables are being used in place of the right inputs.
来源:https://stackoverflow.com/questions/54293234/graphql-variable-using-grapiql-variable-is-undefined