budibase/packages/server/scripts/load/create-many-relationships.js

#!/bin/node
const { createApp, getTable, createRow, createTable } = require("./utils")

const Chance = require("chance")
const generator = new Chance()

const STUDENT_COUNT = 100
const SUBJECT_COUNT = 10

if (!process.argv[2]) {
  console.error("Please specify an API key as script argument.")
  process.exit(-1)
}

async function sleep(ms) {
  return new Promise(r => setTimeout(() => r(), ms))
}

async function run() {
  const apiKey = process.argv[2]
  const app = await createApp(apiKey)
  console.log(`App created: http://localhost:10000/builder/app/${app._id}`)

  const studentsTable = await getTable(apiKey, app._id)
  if (studentsTable.name !== "Students") {
    throw 'Fetched table should be "Students"'
  }
  console.log(`Table found: ${studentsTable.name}`)

  const students = [],
    subjects = []

  let studentNumber = studentsTable.schema["Auto ID"].lastID
  for (let i = 0; i < STUDENT_COUNT; i++) {
    students.push(
      await createRow(apiKey, app._id, studentsTable, {
        "Student Number": (++studentNumber).toString(),
        "First Name": generator.first(),
        "Last Name": generator.last(),
        Gender: generator.pickone(["M", "F"]),
        Grade: generator.pickone(["8", "9", "10", "11"]),
        "Tardiness (Days)": generator.integer({ min: 1, max: 100 }),
        "Home Number": generator.phone(),
        "Attendance_(%)": generator.integer({ min: 0, max: 100 }),
      })
    )
    console.log(`Row ${i + 1} of ${STUDENT_COUNT} created`)
  }

  const subjectTable = await createTable(apiKey, app._id, {
    schema: {
      Name: {
        name: "Name",
        type: "string",
      },
    },
    name: "Subjects",
    primaryDisplay: "Name",
  })

  for (let i = 0; i < SUBJECT_COUNT; i++) {
    subjects.push(
    await createRow(apiKey, app._id, subjectTable, {
      Name: generator.profession(),
    })
    )
    console.log(`Subject ${i + 1} of ${SUBJECT_COUNT} created`)
    await sleep(50)
  }

  const gradesTable = await createTable(apiKey, app._id, {
    schema: {
      Score: {
        name: "Score",
        type: "number",
      },
      Student: {
        name: "Student",
        tableId: studentsTable._id,
        constraints: {
          presence: true,
          type: "array",
        },
        fieldName: "Grades",
        relationshipType: "one-to-many",
        type: "link",
      },
      Subject: {
        name: "Subject",
        tableId: subjectTable._id,
        constraints: {
          presence: true,
          type: "array",
        },
        fieldName: "Grades",
        relationshipType: "one-to-many",
        type: "link",
      },
    },
    name: "Grades",
  })

  let i = 0
  for (const student of students) {
    for (const subject of subjects) {
      await createRow(apiKey, app._id, gradesTable, {
        Score: generator.integer({ min: 0, max: 100 }),
        Student: [student],
        Subject: [subject],
    })
      console.log(
        `Grade ${++i} of ${students.length * subjects.length} created`
      )
      await sleep(20)
    }
  }
}

run().catch(err => {
  console.error(err)
})