fix(langgraph): handle toSerialized() if present to handle V1 changes
#1659
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hntrl
reviewed
Sep 12, 2025
Comment on lines
+126
to
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| function _defaultReplacer(this: any, key: string, value: any) { | ||
| const original = this[key] as unknown; | ||
| if ( | ||
| typeof original === "object" && | ||
| original != null && | ||
| "toSerialized" in original && | ||
| typeof original.toSerialized === "function" | ||
| ) { | ||
| return original.toSerialized(); | ||
| } | ||
|
|
||
| return _default(value); | ||
| } | ||
|
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| export class JsonPlusSerializer implements SerializerProtocol { | ||
| protected _dumps(obj: any): Uint8Array { | ||
| const encoder = new TextEncoder(); | ||
| return encoder.encode( | ||
| stringify(obj, (_: string, value: any) => { | ||
| return _default(value); | ||
| }) | ||
| ); | ||
| return encoder.encode(stringify(obj, _defaultReplacer)); |
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nit: can we just make this a condition inside of _default?
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No, since we need the pre-serialized object
Comment on lines
+128
to
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| if ( | ||
| typeof original === "object" && | ||
| original != null && | ||
| "toSerialized" in original && | ||
| typeof original.toSerialized === "function" | ||
| ) { |
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would it be helpful to export a a isSerializable fn from core?
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Maybe after we release @langchain/core
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