surrealised

Surrealised

A basic SurrealDB Server-Side Client Library for NodeJS. It acts more akin to tranditional database connections, and is designed to be used in a similar way to other SQL libraries. If you have any problems, or suggestions, please open an issue.

Installation

yarn add surrealised@latest

Usage

const Surrealised = require('surrealised');

let surrealClient = new Surrealised();

let results = await surrealClient.query('SELECT * FROM users');

Configuration

Configuration is set either via Environment Variables, or via the class initialisation.

Environment Variables

SURREAL_DB_HOST=http://localhost:8000/rpc
SURREAL_DB_USER=your_user
SURREAL_DB_PASSWORD=your_password
SURREAL_DB_NAMESPACE=your_namespace
SURREAL_DB_DATABASE=your_database
SURREAL_DB_DEBUG=false   #show debug output in the console logs

Class Initialisation

const Surrealised = require('surrealised');

let surrealClient = new Surrealised({
    debug: true,
    connection: {
        host: 'http://localhost:8000/rpc',
        user: 'your_user',
        password: 'your_password',
        namespace: 'your_namespace',
        database: 'your_database'
    } 
});

// The rest of your code

Methods

I have neatened up the methods to make them more intuitive and easier to use (akin to other SQL libraries or ORMs out there)

QueryOne

Return the first row of the last query given.

let result:User = await surrealClient.queryOne<User>('SELECT * FROM users WHERE email = $email', {
    email: '[e-mail]'
});

QueryMany

Return all the results from the last query given.

let results:User[] = await surrealClient.queryMany<User>('SELECT * FROM users WHERE email contains $domain', {
    domain: 'company.com'
});

FetchOne

Fetch a record via it's ID field

let user:User = await surrealClient.fetch<User>('user:bob');

FetchMany

Fetch all records from a table

let users:User[] = await surrealClient.fetchMany<User>('user');

Create

Create a record

let user:User = await surrealClient.create<User>('user', {
    name: 'Bob',
    email: '[e-mail]',
    age: 30
});

Update

Update a record, merges if it exists, create a new record if it doesn't

let user:User = await surrealClient.update<User>('user:bob', {
    age: 31
});

Delete

Delete a record

await surrealClient.delete('user:bob');
// #RIP Bob :(

Execute

Execute a native surrealdb.js query, will return an array of results for each query in the query string.

let results = await surrealClient.execute('SELECT * FROM users');

Using a Static Class Handler

If you want to instantiate the class once and use it throughout your application, keeping the same connection, you can construct a "master class" to handle it. This is not recommended due to SurrealDBs use of Websockets to maintain a connection, and the fact that NodeJS is single threaded, but it is possible if you have a slow(ish) influx of instructions.

// surrealClient.ts
const Surrealised = require('surrealised');
let surrealClient = new Surrealised();
module.exports = surrealClient;

// index.ts (or whatever)
const surrealClient = require('./surrealClient');
let users = surrealClient.queryMany<User>('SELECT * FROM users');

---

SurrealQueryBuilder Usage Guide

The SurrealQueryBuilder class provides a fluent interface for constructing and executing queries against a SurrealDB database. This guide will walk you through the instantiation of the query builder and the use of its major functions.

Instantiation

To create a new instance of the SurrealQueryBuilder, you need to provide the name of the table you'll be querying:

const query = new SurrealQueryBuilder("table_name");

Major Functions

select(...fields: string[])

Selects fields to return from the query. If no fields are specified, * is used to select all fields.

Example:

query.select("id", "name", "age");

where(condition: string)

Starts a condition. Must be present before any AND or OR statements. Adds a condition to the WHERE clause of the query.

Example:

query.where("age > 18");

and(condition: string)

Adds an AND condition to the query. It's essentially an alias to the where method for chaining conditions.

Example:

query.where("age > 18").and("active = true");

or(condition: string)

Starts a new condition group with an OR operator. Useful for grouping conditions together.

Example:

query.where("age < 18").or("guardian_approved = true");

endGroup()

Ends a condition group started with or. Necessary to close the grouping of conditions.

Example:

query.where("age < 18").or("guardian_approved = true").endGroup();

fetch(...fields: string[])

Specifies record joins to fetch details of related records.

Example:

query.fetch("profile", "contacts");

offset(n: number)

Offsets the results by a specified number, for pagination.

Example:

query.offset(10);

limit(n: number)

Limits the number of results returned by the query.

Example:

query.limit(5);

groupBy(...fields: string[])

Groups the results by one or more fields.

Example:

query.groupBy("department");

groupAll()

Groups by all fields

Example:

query.groupAll();

orderBy(...fields: OrderByField[])

Orders the results by one or more fields, with optional direction (ASC or DESC).

Example:

query.orderBy({ field: "name", direction: "ASC" });

split(...fields: string[])

Splits the query results by specified fields.

Example:

query.split("category");

index(...indexes: string[])

Adds indexes to the query to optimize its execution.

Example:

query.index("index_on_name");

build(): string

Constructs and returns the query string based on the specified parameters.

Example:

const queryString = query.build();

queryOne(params: Record<string, any>)

Executes the query and returns a single row or none. It can take a parameter object for any variables within the query.

Example:

query.select("id", "name").where("id = $id").queryOne<{ id: string, name: string }>({ id: "someId" });

queryMany(params: Record<string, any>)

Executes the query and returns many rows. Similar to queryOne, but for retrieving multiple records.

Example:

query.select("id", "name").where("active = true").queryMany<{ id: string, name: string }>();

Variables

You can access the variables dictionary directly to modify, remove or add variables to the query.

query.variables = {
    user: "user:123456",
    date: new Date(),
    count: 10
}

I have also included some helper functions to make this easier:

addVariable(key: string, value: any)

Add a variable to be passed to the query. If the variable already exists, it will be overwritten.

query.addVariable("user", "user:123456")
//... other operations
query.where('created_by = $user')

removeVariable(key: string)

Remove a variable from the query.

query.removeVariable("user")

clearVariables()

Clear all variables from the query.

query.clearVariables()