can1357/oh-my-pi · error · TypeError

memory_id is required

Error message

memory_id is required

What it means

MemoryEvent's constructor requires a non-empty memoryId identifying which memory the event refers to. Both camelCase (memoryId) and snake_case (memory_id) init keys are accepted, but if neither is provided (or both are empty/undefined), the id defaults to "" and the constructor throws a TypeError. This is a fail-fast guard so events are never persisted or streamed without a valid memory reference.

Source

Thrown at packages/mnemopi/src/core/streaming.ts:112

		(ArrayBuffer.isView(value) && !(value instanceof DataView))
	);
}

export class MemoryEvent {
	readonly eventType: EventType;
	readonly memoryId: string;
	readonly timestamp: string;
	readonly sessionId: string | null;
	readonly content: string | null;
	readonly source: string | null;
	readonly importance: number | null;
	readonly metadata: Record<string, unknown> | null;
	readonly delta: Record<string, unknown> | null;

	constructor(init: MemoryEventInit) {
		this.eventType = normalizeEventType(init.eventType ?? init.event_type);
		this.memoryId = init.memoryId ?? init.memory_id ?? "";
		if (this.memoryId.length === 0) throw new TypeError("memory_id is required");
		this.timestamp = init.timestamp ?? new Date().toISOString();
		this.sessionId = init.sessionId ?? init.session_id ?? null;
		this.content = init.content ?? null;
		this.source = init.source ?? null;
		this.importance = init.importance ?? null;
		this.metadata = init.metadata ?? null;
		this.delta = init.delta ?? null;
	}
	toDict(): MemoryEventDict {
		const out: MemoryEventDict = {
			event_type: this.eventType,
			memory_id: this.memoryId,
			timestamp: this.timestamp,
		};
		if (this.sessionId !== null) out.session_id = this.sessionId;
		if (this.content !== null) out.content = this.content;
		if (this.source !== null) out.source = this.source;
		if (this.importance !== null) out.importance = this.importance;

View on GitHub (pinned to 9690622007)

Solutions

1. Pass memoryId (or memory_id) with a non-empty string in the MemoryEventInit object
2. Validate/require the id at the call site before constructing the event, e.g. assert the source record has memory_id
3. If the id may legitimately be absent, do not construct a MemoryEvent — handle that case before instantiation

Example fix

// before
const event = new MemoryEvent({ eventType: "update", content: "hello" });
// after
const event = new MemoryEvent({ eventType: "update", memoryId: memory.id, content: "hello" });

function toMemoryEvent(init) {
	const id = init.memoryId ?? init.memory_id;
	if (typeof id !== "string" || id.length === 0) throw new TypeError("memory_id is required before constructing MemoryEvent");
	return new MemoryEvent({ ...init, memoryId: id });
}

function hasMemoryId(init) {
	return typeof (init.memoryId ?? init.memory_id) === "string" && (init.memoryId ?? init.memory_id).length > 0;
}

try {
	const event = new MemoryEvent(init);
} catch (err) {
	if (err instanceof TypeError && err.message === "memory_id is required") {
		logger.warn("dropping memory event without id", { init });
		return null;
	}
	throw err;
}

When it happens

Trigger: Calling new MemoryEvent({eventType: ...}) without memoryId or memory_id; passing memoryId: "" or memory_id: null explicitly; spreading a partial record that lacks the id field; mapping over events where some rows have no memory_id column value.

Common situations: Constructing events from loose JSON payloads (e.g. webhook or IPC messages) that omit the id; refactoring call sites where the field was renamed; reading legacy rows whose memory_id column is empty; typing the init object as a broader Record so TypeScript can't catch the omission.

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AI-assisted analysis of can1357/oh-my-pi@9690622007 (2026-08-31). Data as JSON: /api/errors/81fff7278c37a71c. Report an issue: GitHub.