@graphql-tools/utils
Version:
Common package containing utils and types for GraphQL tools
72 lines (71 loc) • 3.33 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.getArgumentValues = getArgumentValues;
const cross_inspect_1 = require("cross-inspect");
const graphql_1 = require("graphql");
const errors_js_1 = require("./errors.js");
const jsutils_js_1 = require("./jsutils.js");
/**
* Prepares an object map of argument values given a list of argument
* definitions and list of argument AST nodes.
*
* Note: The returned value is a plain Object with a prototype, since it is
* exposed to user code. Care should be taken to not pull values from the
* Object prototype.
*/
function getArgumentValues(def, node, variableValues = {}) {
const coercedValues = {};
const argumentNodes = node.arguments ?? [];
const argNodeMap = argumentNodes.reduce((prev, arg) => ({
...prev,
[arg.name.value]: arg,
}), {});
for (const { name, type: argType, defaultValue } of def.args) {
const argumentNode = argNodeMap[name];
if (!argumentNode) {
if (defaultValue !== undefined) {
coercedValues[name] = defaultValue;
}
else if ((0, graphql_1.isNonNullType)(argType)) {
throw (0, errors_js_1.createGraphQLError)(`Argument "${name}" of required type "${(0, cross_inspect_1.inspect)(argType)}" ` + 'was not provided.', {
nodes: [node],
});
}
continue;
}
const valueNode = argumentNode.value;
let isNull = valueNode.kind === graphql_1.Kind.NULL;
if (valueNode.kind === graphql_1.Kind.VARIABLE) {
const variableName = valueNode.name.value;
if (variableValues == null || !(0, jsutils_js_1.hasOwnProperty)(variableValues, variableName)) {
if (defaultValue !== undefined) {
coercedValues[name] = defaultValue;
}
else if ((0, graphql_1.isNonNullType)(argType)) {
throw (0, errors_js_1.createGraphQLError)(`Argument "${name}" of required type "${(0, cross_inspect_1.inspect)(argType)}" ` +
`was provided the variable "$${variableName}" which was not provided a runtime value.`, {
nodes: [valueNode],
});
}
continue;
}
isNull = variableValues[variableName] == null;
}
if (isNull && (0, graphql_1.isNonNullType)(argType)) {
throw (0, errors_js_1.createGraphQLError)(`Argument "${name}" of non-null type "${(0, cross_inspect_1.inspect)(argType)}" ` + 'must not be null.', {
nodes: [valueNode],
});
}
const coercedValue = (0, graphql_1.valueFromAST)(valueNode, argType, variableValues);
if (coercedValue === undefined) {
// Note: ValuesOfCorrectTypeRule validation should catch this before
// execution. This is a runtime check to ensure execution does not
// continue with an invalid argument value.
throw (0, errors_js_1.createGraphQLError)(`Argument "${name}" has invalid value ${(0, graphql_1.print)(valueNode)}.`, {
nodes: [valueNode],
});
}
coercedValues[name] = coercedValue;
}
return coercedValues;
}