WealthWise-Finance-Tracker: Skill for Claude Code

Scaffold a new Mongoose model with its full CRUD service.

The entity name is provided in the task prompt.

Files to create

Model — apps/api/src/models/<entity>.model.ts

import { Schema, model, Document, Types } from 'mongoose';

export interface I<Entity> extends Document {
  userId: Types.ObjectId;
  // entity-specific fields
  createdAt: Date;
  updatedAt: Date;
}

const <entity>Schema = new Schema<I<Entity>>(
  {
    userId: {
      type: Schema.Types.ObjectId,
      ref: 'User',
      required: true,
      index: true,
    },
    // entity fields
  },
  {
    timestamps: true,    // handles createdAt/updatedAt automatically
    toJSON: { virtuals: true },
    toObject: { virtuals: true },
  }
);

// All indexes defined here — never outside the schema file
<entity>Schema.index({ userId: 1, createdAt: -1 });

export const <Entity>Model = model<I<Entity>>('<Entity>', <entity>Schema);

Service — apps/api/src/services/<entity>.service.ts

Five methods, fully typed:

1. get<Entity>s(userId: string): Promise<I<Entity>[]>

   • Filter: { userId: new Types.ObjectId(userId) }

2. get<Entity>ById(id: string, userId: string): Promise<I<Entity>>

   • Throw ApiError.notFound('<Entity> not found') if not found — never return null

3. create<Entity>(userId: string, data: Create<Entity>Input): Promise<I<Entity>>

   • Attach userId to the document before saving

4. update<Entity>(id: string, userId: string, data: Update<Entity>Input): Promise<I<Entity>>

   • Filter by both _id and userId — throw ApiError.notFound if missing
   • Use { new: true } in findOneAndUpdate

5. delete<Entity>(id: string, userId: string): Promise<void>

   • Filter by both _id and userId — throw ApiError.notFound if missing

Rules

• Import ApiError from utils/api-error.ts — never throw new Error(...)
• Every query includes userId as a filter — no cross-user access
• Use new Types.ObjectId(userId) when building ObjectId filters
• Never expose raw Mongoose errors — catch and rethrow as ApiError.internal(...)
• Named exports only. No any.