Script to check that inverses are set and match in Ember.js.

check-inverses.js

/* eslint-disable node/no-extraneous-require */
const babelParser = require('@babel/parser')
const _ = require('lodash')

const fs = require('fs')
const path = require('path')

const DIR = './app/models'
const files = fs.readdirSync(DIR).filter((f) => f.match(/\.js$/))

const parsedModels = {}

for (const file of files) {
  const data = fs.readFileSync(path.join(DIR, file))
  const name = file.replace(/\.js$/, '')
  parsedModels[name] = babelParser.parse(data.toString(), { sourceType: 'module', plugins: ['decorators'] })
}

const models = {}

for (const [name, parsed] of Object.entries(parsedModels)) {
  const declaration =
    parsed.program.body.find((n) => n.type === 'ClassDeclaration') ??
    parsed.program.body.find((n) => n.type === 'ExportDefaultDeclaration').declaration
  const rels = declaration?.body.body.filter((n) =>
    n.decorators?.some((d) => d.expression?.callee?.name === 'hasMany' || d.expression?.callee?.name === 'belongsTo')
  )

  models[name] = rels.map((rel) => {
    const model = rel.decorators[0].expression.arguments[0].value
    const inverseProp = rel.decorators[0].expression.arguments[1]?.properties.find(
      ({ key: { name } }) => name === 'inverse'
    )
    const inverse = inverseProp?.value.value
    const inverseIsNull = !inverse && inverseProp && inverseProp.value.type === 'NullLiteral'
    return { name: rel.key.name, inverse, inverseIsNull, model }
  })
}

for (const [name, rels] of Object.entries(models)) {
    for (const { name: relName, inverse, inverseIsNull, model } of rels) {
      if (inverse) {
        const inverseModelRels = models[_.kebabCase(model)]
        if (inverseModelRels) {
          const invRel = inverseModelRels.find(({ name }) => name === inverse)
          if (invRel) {
            if (_.kebabCase(invRel.model) !== name) {
              console.log(name, relName, 'wrongname')
            }
            if (invRel.inverse !== relName) {
              console.log(name, relName, 'wronginverse')
            }
          } else {
            console.log(name, relName, 'nomatch')
          }
        } else {
          console.log(name, relName, 'nomodel')
        }
      } else if (inverseIsNull) {
        // console.log(name, relName, 'null')
      } else {
        console.log(name, relName, 'missing')
      }
    }
}