@langchain/langgraph
Version:
LangGraph
41 lines • 1.75 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const zod_1 = require("zod");
const state_js_1 = require("./state.cjs");
const metaSymbol = Symbol.for("langgraph-zod");
if (!(metaSymbol in globalThis)) {
globalThis[metaSymbol] = new WeakSet();
}
try {
const cache = globalThis[metaSymbol];
if (!cache?.has(zod_1.z.ZodType.prototype)) {
Object.defineProperty(zod_1.z.ZodType.prototype, "langgraph", {
get() {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const zodThis = this;
return {
metadata(jsonSchemaExtra) {
(0, state_js_1.extendMeta)(zodThis, (meta) => ({ ...meta, jsonSchemaExtra }));
return zodThis;
},
reducer(fn, schema) {
const defaultFn = (0, state_js_1.isZodDefault)(zodThis)
? // @ts-expect-error Due to `_def` being `any`
zodThis._def.defaultValue
: undefined;
(0, state_js_1.extendMeta)(zodThis, (meta) => ({
...meta,
default: defaultFn ?? meta?.default,
reducer: { schema, fn },
}));
return zodThis;
},
};
},
});
}
}
catch (error) {
throw new Error("Failed to extend Zod with LangGraph-related methods. This is most likely a bug, consider opening an issue and/or using `withLangGraph` to augment your Zod schema.", { cause: error });
}
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