Mini Object-relational Mapper

Requirements

• Export MiniORM as named and default. new MiniORM(modelNames) accepts unique nonempty model-name strings. model(name) returns a stable delegate for a registered model; unknown models throw Error. Invalid/duplicate model names throw TypeError.
• Delegates expose synchronous create({ data }), findUnique({ where: { id } }), findMany({ where? } = {}), update({ where: { id }, data }), and delete({ where: { id } }). Records are flat own-enumerable string fields containing null, strings, booleans, or finite numbers. Data and filters must be plain objects; reject unsupported field values with TypeError.
• create generates per-model positive integer IDs starting at 1 when data has no own id. Explicit positive safe-integer IDs are allowed, must be unique, and advance the next generated ID beyond them. Deleted IDs are not automatically reused. Invalid IDs throw TypeError; duplicate IDs throw Error.
• findUnique returns a copied record or null. findMany returns copied records in insertion order, filtered by all own where fields using Object.is equality, with no coercion. Unknown filter fields fail to match. An empty filter matches all records.
• update shallowly assigns data fields to an existing record and returns its copy. Updating id is forbidden, even to its existing value. delete removes and returns a copy. Missing update/delete targets throw Error. Invalid writes leave stored records and ID counters unchanged.
• Models and ORM instances have independent storage. Returned records and input data/filter objects must not expose internal mutable records. Safely define special field names such as __proto__ as data without prototype pollution. No relations, nested writes, promises, SQL, schema validation, ordering options, pagination, or transactions are required.

Examples

Input: const db = new MiniORM(["user"]); const users = db.model("user"); users.create({ data: { name: "Ada" } }); users.findMany({ where: { name: "Ada" } });
Output: { id: 1, name: "Ada" }, then [{ id: 1, name: "Ada" }]

Input: users.update({ where: { id: 1 }, data: { active: true } });
Output: { id: 1, name: "Ada", active: true }