node_modules.graphql.validation.rules.VariablesInAllowedPosition.mjs Maven / Gradle / Ivy
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Maven plugin for generating graphql clients
import { GraphQLError } from '../../error'; /**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* strict
*/
import { GraphQLNonNull, isNonNullType } from '../../type/definition';
import { isTypeSubTypeOf } from '../../utilities/typeComparators';
import { typeFromAST } from '../../utilities/typeFromAST';
export function badVarPosMessage(varName, varType, expectedType) {
return 'Variable "$' + varName + '" of type "' + String(varType) + '" used in ' + ('position expecting type "' + String(expectedType) + '".');
}
/**
* Variables passed to field arguments conform to type
*/
export function VariablesInAllowedPosition(context) {
var varDefMap = Object.create(null);
return {
OperationDefinition: {
enter: function enter() {
varDefMap = Object.create(null);
},
leave: function leave(operation) {
var usages = context.getRecursiveVariableUsages(operation);
usages.forEach(function (_ref) {
var node = _ref.node,
type = _ref.type;
var varName = node.name.value;
var varDef = varDefMap[varName];
if (varDef && type) {
// A var type is allowed if it is the same or more strict (e.g. is
// a subtype of) than the expected type. It can be more strict if
// the variable type is non-null when the expected type is nullable.
// If both are list types, the variable item type can be more strict
// than the expected item type (contravariant).
var schema = context.getSchema();
var varType = typeFromAST(schema, varDef.type);
if (varType && !isTypeSubTypeOf(schema, effectiveType(varType, varDef), type)) {
context.reportError(new GraphQLError(badVarPosMessage(varName, varType, type), [varDef, node]));
}
}
});
}
},
VariableDefinition: function VariableDefinition(node) {
varDefMap[node.variable.name.value] = node;
}
};
}
// If a variable definition has a default value, it's effectively non-null.
function effectiveType(varType, varDef) {
return !varDef.defaultValue || isNonNullType(varType) ? varType : GraphQLNonNull(varType);
}
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