autoValue: this.field() not working inside a subSchema

[loichu]

Hello,

Firstly, thank you very much for this awesome package that makes me save a lot of time.

As I already mentioned here: #412 (comment), I noticed that during the cleaning process, I cannot get any field outside of the subschema. However, it works in the opposite direction: I can get a subSchema field value from the parent schema. I tried to read your code to fix it myself but it was too complex and unfortunately I cannot invest more time in it yet.

Here are the tests you can run to reproduce this behavior:

  // This test is passing
  it('is possible to get a first level field value from inside a nested object', function () {
    const test = {
      firstLevel: '1st level',
      nestedObject: {
        secondLevel: false
      }
    }
    const schema = new SimpleSchema({
      firstLevel: String,
      nestedObject: Object,
      'nestedObject.secondLevel': {
        type: Boolean,
        autoValue() {
          return this.field('firstLevel').value === test.firstLevel
        }
      }
    })
    const cleaned = schema.clean(test)
    expect(cleaned.nestedObject.secondLevel).toBe(true)
  })

  // This one is not
  it('is possible to get a first level field value from inside a subSchema', function () {
    const test = {
      firstLevel: '1st level',
      nestedObject: {
        secondLevel: false
      }
    }
    const subSchema = new SimpleSchema({
      secondLevel: {
        type: Boolean,
        autoValue() {
          return this.field('firstLevel').value === test.firstLevel
        }
      }
    })
    const schema = new SimpleSchema({
      firstLevel: String,
      nestedObject: subSchema
    })
    const cleaned = schema.clean(test)
    expect(cleaned.nestedObject.secondLevel).toBe(true)
  })

  // But this one is
  it('is possible to get a subSchema field value from a first level field', function () {
    const test = {
      firstLevel: false,
      nestedObject: {
        secondLevel: '2nd level'
      }
    }
    const subSchema = new SimpleSchema({
      secondLevel: String
    })
    const schema = new SimpleSchema({
      nestedObject: subSchema,
      firstLevel: {
        type: Boolean,
        autoValue() {
          return this.field('nestedObject.secondLevel').value === test.nestedObject.secondLevel
        }
      },
    })
    const cleaned = schema.clean(test)
    expect(cleaned.firstLevel).toBe(true)
  })

It works as expected inside validation functions like custom().

Thank you for your investment in OSS, you made a lot of good stuff for the javascript ecosystem.

[github-actions]

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