books/README.md

Frappe Core

Core libs for Frappe Framework JS

Declaring Models

Models are declared by adding a .json model file in the models/doctype folder of the module/app.

{
	"autoname": "hash",
	"name": "ToDo",
	"doctype": "DocType",
	"issingle": 0,
	"fields": [
		{
			"fieldname": "subject",
			"label": "Subject",
			"fieldtype": "Data",
			"reqd": 1
		},
		{
			"fieldname": "description",
			"label": "Description",
			"fieldtype": "Text"
		},
		{
			"fieldname": "status",
			"label": "Status",
			"fieldtype": "Select",
			"options": [
				"Open",
				"Closed"
			],
			"default": "Open",
			"reqd": 1
		}
	]
}

Setup / Migrate

const frappe = require('frappe-core');
frappe.init();

// sync all schema from `models` folders in all apps
frappe.migrate();

Managing Documents

Frappe Object-Relational-Mapper (ORM) helps you manage (create, read, update, delete) documents based on the DocTypes declared.

Documents are sub-classed from the frappe.document.Document class.

All document write methods are asynchronous and return javascript Promise objects.

Initialize

Documents are initialized with the frappe.get_doc method. If doctype and name are passed as parameters, then the document is fetched from the backend. If a simple object is passed, then object properties are set in the document.

const frappe = require('frappe-core');
await frappe.init();

// make a new todo
let todo = await frappe.get_doc({doctype: 'ToDo', subject: 'something'});

Create

You can insert a document in the backend with the insert method.

const frappe = require('frappe-core');
await frappe.init();

// make a new todo
let todo = await frappe.get_doc({doctype: 'ToDo', subject: 'something'});
await todo.insert();

Read

You can read a document from the backend with the frappe.get_doc method

const frappe = require('frappe-core');
await frappe.init();

// get all open todos
let todos = await frappe.db.get_all('ToDo', ['name'], {status: "Open"});
let first_todo = await frappe.get_doc('ToDo', toods[0].name);

Update

The update method updates a document.

const frappe = require('frappe-core');
await frappe.init();

// get all open todos
let todos = await frappe.db.get_all('ToDo', ['name'], {status: "Open"});
let first_todo = await frappe.get_doc('ToDo', toods[0].name);

first_todo.status = 'Closed';
await first_todo.update();

Delete

The delete method deletes a document.

const frappe = require('frappe-core');
await frappe.init();

// get all open todos
let todos = await frappe.db.get_all('ToDo', ['name'], {status: "Open"});
let first_todo = await frappe.get_doc('ToDo', toods[0].name);

await first_todo.delete();

Metadata

Metadata are first class objects in Frappe. You can get a metadata object by frappe.get_meta. All objects from the models folders of all modules are loaded.

const frappe = require('frappe-core');
frappe.init();

let todo_meta = frappe.get_meta('ToDo');

// get all fields of type "Data"
let data_fields = todo_meta.fields.map(d => d.fieldtype=='Data' ? d : null);

Controllers

You can write event handlers in controllers, by declaring a .js file in the models/doctype/ folder along with the model file.

The name of the class must be the slugged name of the DocType

To add a standard handler, you must bind all handlers in setup method.

const frappe = require('frappe-core');

class todo extends frappe.document.Document {
	setup() {
		this.add_handler('validate');
	}

	validate() {
		// set default status as "Open" if not set
		if (!this.status) {
			this.status = 'Open';
		}
	}
}

module.exports = { todo: todo };

Controller Events

Standard events on which you can bind handlers are

• before_insert
• before_update
• validate (called before any write)
• after_insert,
• after_update (called after any write)
• before_submit
• after_submit
• before_cancel
• after_cancel
• before_delete
• after_delete

Database

You can also directly write SQL with frappe.db.sql

const frappe = require('frappe-core');
frappe.init();

all_todos = frappe.db.sql('select name from todo');

REST API

You can directly access documents at /api/resource/:doctype

Create

• URL: /api/resource/:doctype
• Method: POST
• Data: document properties

Example:

• URL: /api/resource/todo
• Method: POST

Data:

{
	"subject": "test",
	"description": "test description"
}

Read

• URL: /api/resource/:doctype/:name
• Method: GET

Example:

• URL: /api/resource/todo/uig7d1v12

Reponse:

{
	"name": "uig7d1v12",
	"owner": "guest",
	"modified_by": "guest",
	"creation": "2018-01-01T12:08:19.482Z",
	"modified": "2018-01-01T12:08:19.482Z",
	"docstatus": 0,
	"subject": "test 1",
	"description": "description 1",
	"status": "Open"
}

List

• URL: /api/resource/:doctype/
• Method: GET
• Params (optional)
  • start: Page start
  • limit: Page limit

Example:

• URL: /api/resource/todo

Response:

[
	{
		"name": "r4qxyki0i6",
		"subject": "test 1"
	},
	{
		"name": "efywwvtwcp",
		"subject": "test 1"
	},
	{
		"name": "9ioz05urgp",
		"subject": "test 1"
	}
]

Tests

All tests are in the tests folder and are run using mocha. To run tests

npm run test