This article gets you started with light services

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What is light service

Light service is a future-oriented cloud service platform produced by Bytedance. It provides cloud services such as database, page hosting and resource storage for developers, allowing developers to quickly develop web pages and small programs without building servers…

To get started

Enter the homepage of the light service official website, register and pass the real-name authentication, and create the first service on the homepage

Create the first service

1. Click Create Service
2. Enter a service name in the dialog box that is displayedproject

After a few moments we are in the control panel for the service we created

Cloud function

Cloud functions are the building blocks of light service applications and are where developers write the main business and functionality.

Quickly create a cloud function

1. Go to the sidebar – Cloud Functions
2. I’m gonna hit Create function

3. In the dialog box that is displayed, enter the cloud function namemyFunction, click OK

Debug cloud functions

The light service provides the function of debugging functions online, so that developers can quickly view the results of functions during development.

After entering the debugging parameter Params, click start debugging to debug the function, and you can see the running result on the console after running

On-line cloud function

After writing the cloud function, you need to click online to use it in the real environment

After the cloud function is online, click the copy call address above to copy the call address to the clipboard

Calling the cloud function

axios.post('https://qcvrso.fn.thelarkcloud.com/myFunction', params)
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Installing dependent libraries

In the lower left cornerNPM rely onClick on the+In the dialog box that is displayed, enter the NPM package to be installed, select the corresponding version number, and clickThe installationQuick installation

Uninstalling dependent libraries

To uninstall installed packages, move the mouse pointer to the delete button on the right of the package in the lower right corner

The database

Create the first table quickly

Click on the sidebarData managementEnter the page and clickcreate Enter the table name in the pop-up boxbooks, click on thedetermine

• The table name must contain digits, letters, and underscores (_) and cannot start with underscores (_).
• The maximum number of service tables is 100.

Insert data

1. Use Inspirecloud.db.table to get the data table

const table = inspirecloud.db.table('books');
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2. Add a record using the save method

const result = await tableable.save({name: 'The Little Prince'.author: 'Antoine DE Saint Exupery -'});

return result;
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After clicking start debugging, you can see the results in the console

Re-enter the database and you can seebooksAdd a new record to the table:

Query data

1. Query data based on a field

Query fineOne that meets the conditions

const table = inspirecloud.db.table('books');
const result = await table.where({name: 'The Little Prince'}).findOne()

return result
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Find Queries all data that meet the criteria

const table = inspirecloud.db.table('books');
const result = await table.where({name: 'The Little Prince'}).find()

return result
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Click Start Debug to see the console output

If you want to query data using _id, run the where({_id: ObjectId(‘ XXXXX ‘)} command.

2. Queries data based on a field value greater than (less than) a value

The value of the price field is greater than 100db.gt().

const book = await BooksTable.where({ price: db.gt(100) }).find();
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Price field value < 100db.lt()

const book = await BooksTable.where({ price: db.lt(100) }).find();
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Price field value greater than or equal to 100db.gte()

const book = await BooksTable.where({ price: db.gte(100) }).find();
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Price field value less than or equal to 100db.lte()

const book = await BooksTable.where({ price: db.lte(100) }).find();
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3. Query data by field range

Price field value range: [100,200]

const book = await BooksTable.where({ price: db.gte(100).lte(200) }).find();
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4. Query data for multiple conditions

Select * from books where the name of the Book is Prince and the price range is between [100,200]

const book = await BooksTable.where({ name: 'The Little Prince'.price: db.gte(100).lte(200) }).find();
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Change the data

Query the corresponding data first, use the save method to update to the database

// Change the name of the book
module.exports = async function(params, context) {
  // Use inspirecloud.db.table to get the data table
  const BookTable = inspirecloud.db.table('books');
  // Use where to specify that the query condition is _id
  let book = await BookTable.where({_id: ObjectId(params.id)}).findOne();
  // If no record is found, initialize a record
  if(! book){ book = BookTable.create({name: params.name, author: params.author});
  }else {
    book.name = params.name
  }
  await BookTable.save(book);
  
  return {
    result: book,
  };
}
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Delete the data

Query the corresponding data and delete the data from the database using the delete method

module.exports = async function(params, context) {
  // Use inspirecloud.db.table to get the data table
  const BookTable = inspirecloud.db.table('books');
  // Use where to specify that the number of inventories is less than or equal to 100
  const book = await BookTable.where({ name: 'The Little Prince' }).find();
  // Use delete to delete these records
  const result = await BookTable.delete(book);
  
  return {
    result,
  };
}
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There are several simple ways to manipulate data. For more details, see the official documentation of the Light Service

Page hosting

The light service provides page deployment capabilities that allow developers to quickly deploy pages in just a few steps and provide an accessible HTTPS domain name

Run the NPM Run build package in your Vue or React project and zip the generated dist folder into a. Zip file and upload it to the light service for quick deployment