Model

The Model class represents a schema-defined entity in RushDB. It provides methods to perform CRUD operations and manage relationships between records. Models are identified by labels in the database.

Usage

import { Model } from '@rushdb/javascript-sdk';

// Define a schema
const UserSchema = {
  name: { type: 'string', required: true },
  email: { type: 'string', required: true, unique: true },
  age: { type: 'number' },
  active: { type: 'boolean', default: true }
};

// Create a model
const UserModel = new Model('User', UserSchema);

Type Parameters

Parameter	Description
S extends Schema = any	The schema type that defines the structure of the model's records

Constructor

constructor(modelName: string, schema: S)

Creates a new Model instance.

Parameters

Parameter	Type	Description
modelName	string	The name/label of the model in the database
schema	S	The schema definition that describes the model's structure

Properties

label

public readonly label: string

The name/label of the model in the database.

schema

public readonly schema: S

The schema definition that describes the model's structure.

draft

readonly draft!: InferType<Model<S>>

Type helper for a draft version of the schema. Represents a flat object containing only the record's own properties (defined by the schema), excluding system fields such as __id, __label, and __proptypes. This type does not yet have a representation on the database side.

record

readonly record!: DBRecord<S>

Type helper for a fully-defined record with database representation. Similar to the draft, but includes all fields that come with the record's database-side representation, such as __id, __label, and __proptypes.

searchQuery

readonly searchQuery!: SearchQuery<S>

Type helper for a SearchQuery of the schema. Represents a structured query input that enables filtering, sorting, pagination, and aggregation of records based on schema-defined fields. Useful for composing reusable, type-safe search expressions.

recordInstance

readonly recordInstance!: DBRecordInstance<S>

Type helper for a single record instance. Extends the record by providing additional methods to operate on this specific record, such as saving, updating, or deleting it.

recordsArrayInstance

readonly recordsArrayInstance!: DBRecordsArrayInstance<S>

Type helper for an array of record instances. Similar to a single record instance but supports batch or bulk operations, allowing efficient management of multiple records simultaneously.

Type-only properties on Model

These helpers are available for typing only and are not populated at runtime. They exist to let you derive precise types from a model without constructing values in code.

Properties that are type-only:

• draft
• record
• recordInstance
• recordsArrayInstance
• searchQuery

Practical usage examples:

// DO: derive types using typeof
export type UserRecord = typeof UserModel.record;
export type UserRecordResult<T extends Record<PropertyKey, any> = never> =
  typeof UserModel.recordInstance & { data: T };
export type UserRecordsArrayResult = typeof UserModel.recordsArrayInstance;
export type UserRecordDraft = typeof UserModel.draft;
export type UserSearchQuery = SearchQuery<typeof UserModel.schema>;

// DON'T: read them at runtime — they aren’t real values
// console.log(UserModel.record) // undefined at runtime

If you need an actual instance at runtime, work with query results (e.g., find, findOne, create) or convert a raw record via toDBRecordInstance.

Typing results when using aggregations and groupBy

When you add aggregations or grouping to a SearchQuery, the result shape may no longer match your model schema. To accommodate this, the helper type uses a wildcard extension: typeof Model.recordInstance & { data: T }.

How it works:

• typeof Model.recordInstance gives you the instance methods and base record metadata.
• & { data: T } lets you “overlay” the actual data payload you expect back from an aggregated/grouped query, bypassing strict schema checks in those scenarios.

Example:

// Self-group on an aggregated value
const deals = await DealModel.find({
  aggregate: {
    totalAmount: { fn: 'sum', field: 'amount', alias: '$record' }
  },
  groupBy: ['totalAmount']
});

// Tell TS what the aggregated row contains
type DealAggRow = typeof DealModel.recordInstance & { data: { totalAmount: number } };
const firstRow = deals.data[0] as DealAggRow;

Notes:

• Use this pattern whenever aggregate and/or groupBy change the returned columns.
• For regular record fetches (no aggregation/grouping), prefer the plain typeof Model.recordInstance without augmenting data.

Methods

getLabel()

public getLabel(): string

Retrieves the model's label.

Returns: The label/name of the model

toInstance()

public toInstance(record: DBRecord<S>): DBRecordInstance<S>

Converts a database record to a record instance with additional methods.

Parameters:

• record: The database record to convert

Returns: A record instance with additional methods

Throws: Error if no RushDB instance was provided during initialization

find()

async find<Q extends SearchQuery<S> = SearchQuery<S>>(
  searchQuery?: Q & { labels?: never },
  transaction?: Transaction | string
): Promise<DBRecordsArrayInstance<S, Q>>

Finds records that match the given search criteria.

Parameters:

• searchQuery: Optional search criteria
• transaction: Optional transaction or transaction ID

Returns: Promise resolving to matching records

findOne()

async findOne<Q extends SearchQuery<S> = SearchQuery<S>>(
  searchQuery?: Q & {
    labels?: never
    limit?: never
    skip?: never
  },
  transaction?: Transaction | string
): Promise<DBRecordInstance<S, Q> | null>

Finds a single record that matches the given search criteria.

Parameters:

• searchQuery: Optional search criteria
• transaction: Optional transaction or transaction ID

Returns: Promise resolving to the matching record or null if not found

findById()

async findById(
  id: string,
  transaction?: Transaction | string
): Promise<DBRecordInstance<S> | null>

Finds a record by its ID.

Parameters:

• id: The ID of the record to find
• transaction: Optional transaction or transaction ID

Returns: Promise resolving to the matching record or null if not found

findUniq()

async findUniq<Q extends SearchQuery<S> = SearchQuery<S>>(
  searchQuery?: Q & {
    labels?: never
    limit?: never
    skip?: never
  },
  transaction?: Transaction | string
): Promise<DBRecordInstance<S, Q> | null>

Finds a unique record that matches the given search criteria.

Parameters:

• searchQuery: Optional search criteria
• transaction: Optional transaction or transaction ID

Returns: Promise resolving to the unique matching record or null if not found

create()

async create(
  record: InferSchemaTypesWrite<S>,
  transaction?: Transaction | string
): Promise<DBRecordInstance<S>>

Creates a new record in the database.

Parameters:

• record: The record data to create
• transaction: Optional transaction or transaction ID

Returns: Promise resolving to the created record

Throws: UniquenessError if the record violates uniqueness constraints

attach()

attach(
  {
    source,
    target,
    options
  }: {
    source: DBRecordTarget
    target: RelationTarget
    options?: RelationOptions
  },
  transaction?: Transaction | string
): Promise<any>

Attaches a relationship between records.

Parameters:

• params: Object containing source, target, and relationship options
• transaction: Optional transaction or transaction ID

Returns: Promise resolving to the result of the attach operation

Type Definitions

InferType

export type InferType<M extends Model<any> = Model<any>> = FlattenTypes<InferSchemaTypesRead<M['schema']>>

Helper type that infers the type structure from a Model instance.

Type Parameters:

• M: The Model type to infer from

TypeScript: extend SDK types for schema-aware suggestions

To get first-class IDE autocomplete and end-to-end type safety that respects your model schemas (including nested related-queries), augment the SDK’s empty Models interface with your app’s models.

1) Define your models and export a Models map

Create a file like types.ts in your app and export a mapping of label → schema, plus any handy derived types:

// types.ts

import { SearchQuery, Model } from '@rushdb/javascript-sdk';

// Optional utility in your app
import { getCurrentISO } from '@/common/utils/getCurrentISO';

export const USER = 'USER' as const;

export const UserModel = new Model(USER, {
  name: { type: 'string' },
  avatar: { type: 'string' },
  login: { type: 'string', unique: true },
  password: { type: 'string' },
  createdAt: { type: 'datetime', default: getCurrentISO },
  tags: { type: 'string', multiple: true, required: false },
});

export type UserRecord = typeof UserModel.record;
export type UserRecordResult<T extends Record<PropertyKey, any> = never> =
  typeof UserModel.recordInstance & { data: T };
export type UserRecordsArrayResult = typeof UserModel.recordsArrayInstance;
export type UserRecordDraft = typeof UserModel.draft;
export type UserSearchQuery = SearchQuery<typeof UserModel.schema>;

// This map is used to teach the SDK about your labels and their schemas
export type Models = {
  [USER]: typeof UserModel.schema;
};

Notes:

• The property for uniqueness is unique in the SDK.
• Adjust any import aliases like @/common/... to match your project setup.

2) Augment the SDK’s Models interface

Create a project-level declaration file (for example index.d.ts) that merges your Models into the SDK. Make sure this file is included by your tsconfig (see next section):

// index.d.ts (path can be anything, just ensure tsconfig includes it)
import {} from '@rushdb/javascript-sdk';

// Import the map you exported in step 1 (adjust the path for your project)
import { Models as AppModels } from '@/platform-app/types';

declare module '@rushdb/javascript-sdk' {
  // This merges your labels/schemas so SearchQuery<Related> gets rich intellisense
  export interface Models extends AppModels {}
}

After this merge, places that use Related<Models> (e.g., where clauses with nested related objects) will autocomplete and type-check against your actual fields.

3) TS config tips for great DX

Ensure TypeScript can find your declaration file and resolve any path aliases used in your imports.

Minimal tsconfig settings to verify:

{
  "compilerOptions": {
    "strict": true,
    "module": "esnext",
    "target": "es2020",
    "moduleResolution": "bundler", // or "node"/"node16" depending on your toolchain
    "baseUrl": ".",                 // if you use path aliases
    "paths": {
      "@/*": ["src/*"]              // adjust to match your alias usage like '@/...'
    },
    // Keep this true if you want to validate library .d.ts files too
    // "skipLibCheck": false
  },
  "include": [
    "src",
    "index.d.ts"      // include your augmentation (or its actual path)
  ]
}

Common gotchas:

• If the module augmentation isn’t picked up, double-check that the .d.ts file is inside tsconfig’s include (or not excluded).
• Monorepo/workspaces: put the augmentation in the consuming app/package and ensure that package’s tsconfig includes it.
• If you use ESM + TS 5’s “verbatimModuleSyntax”, keep imports as type-only where needed.

4) Example of typed related queries

With the augmentation in place, related objects in where become schema-aware:

const posts = await db.records.find({
  labels: ['post'],
  where: {
    author: {
      login: { $contains: 'john' },      // autocomplete from Author schema
    },
  },
});

This setup gives you end-to-end safety: drafts, records, queries, and nested relations all derive types from your single source of truth—the model schemas you define.