EOH Developer
45 lines
1.9 KiB
TypeScript
45 lines
1.9 KiB
TypeScript
import { Schema, model, models, Model, Types, Document } from "mongoose";
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// A recorded stock purchase from a supplier. Completing a purchase is what
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// increases branch stock. Price fields are snapshotted onto the record so
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// historical purchases never change when a product's price changes later.
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export interface IPurchase extends Document {
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_id: Types.ObjectId;
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businessId: Types.ObjectId; // tenant this purchase belongs to
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branchId: Types.ObjectId;
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supplierName: string;
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productId: Types.ObjectId | null;
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productLabel: string; // snapshot of the product name at purchase time
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quantity: number;
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unitCost: number; // buying price, snapshotted
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totalCost: number; // quantity * unitCost, snapshotted
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reference: string | null;
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notes: string | null;
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recordedBy: Types.ObjectId;
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createdAt: Date; // authoritative — server clock
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updatedAt: Date;
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}
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const purchaseSchema = new Schema<IPurchase>(
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{
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businessId: { type: Schema.Types.ObjectId, ref: "Business", required: true, index: true },
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branchId: { type: Schema.Types.ObjectId, ref: "Branch", required: true },
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supplierName: { type: String, required: true, trim: true },
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productId: { type: Schema.Types.ObjectId, ref: "Product", default: null },
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productLabel: { type: String, required: true, trim: true },
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quantity: { type: Number, required: true, min: 1 },
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unitCost: { type: Number, required: true, min: 0 },
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totalCost: { type: Number, required: true, min: 0 },
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reference: { type: String, default: null, trim: true },
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notes: { type: String, default: null, trim: true },
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recordedBy: { type: Schema.Types.ObjectId, ref: "User", required: true },
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},
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{ timestamps: true }
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);
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purchaseSchema.index({ branchId: 1, createdAt: -1 });
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purchaseSchema.index({ productId: 1 });
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export const Purchase =
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(models.Purchase as Model<IPurchase>) || model<IPurchase>("Purchase", purchaseSchema);
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