Ajv validation inside allOf

[ivan-tymoshenko]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the issue has not already been raised

Issue

There is a fastify issue fastify/fastify#4092
I reduced the test example.

test('anyOf inside allOf', (t) => {
  t.plan(1)

  const schema = {
    anyOf: [
      {
        type: 'object',
        allOf: [
          {
            properties: {
              a: {
                anyOf: [
                  { const: 'A1' },
                  { const: 'A2' }
                ]
              }
            }
          },
          {
            properties: {
              b: { const: 'B' }
            }
          }
        ]
      }
    ]
  }

  const object = { a: 'A1', b: 'B' }
  const stringify = build(schema)
  const output = stringify(object)

  t.equal(output, JSON.stringify(object))
})

I'm working on that.

[climba03003]

Will it be fixed by #480

[ivan-tymoshenko]

@climba03003 No, it's a different issue.

[ivan-tymoshenko]

This problem happens when we add a schema that contains allOf property to the Ajv, and then we merge allOf and use json pointer that doesn't contain allOf.

[ivan-tymoshenko]

@climba03003 It turns out that #480 fixed this, despite the fact that they are different problems. #480 has a small bug. I fixed it here #482.

[smonn]

FWIW, I think I encountered this issue too while using a schema similar to this (observed in 5.0.4, unrelated to #479):

{
  "type": "object",
  "required": [
    "list"
  ],
  "properties": {
    "list": {
      "type": "array",
      "items": {
        "type": "object",
        "allOf": [
          {
            "type": "object",
            "required": [
              "value"
            ],
            "properties": {
              "value": {
                "anyOf": [
                  {
                    "type": "string",
                    "const": "one"
                  },
                  {
                    "type": "string",
                    "const": "two"
                  }
                ]
              }
            }
          }
        ]
      }
    }
  }
}

Error: no schema with key or ref "merged_d63d76d2-7f36-4b28-8997-579e7e46cfdb#/properties/list/items/properties/value/anyOf/0"
    at Ajv.validate (..../node_modules/ajv/lib/core.ts:359:21)
    at anonymous2 (eval at build (..../node_modules/fast-json-stringify/index.js:177:23), <anonymous>:30:20)
    at anonymous1 (eval at build (..../node_modules/fast-json-stringify/index.js:177:23), <anonymous>:64:17)
    at anonymous0 (eval at build (..../node_modules/fast-json-stringify/index.js:177:23), <anonymous>:92:15)
    at main (eval at build (..../node_modules/fast-json-stringify/index.js:177:23), <anonymous>:6:15)
    at Object.<anonymous> (..../src/index.ts:345:27)
    at Module._compile (node:internal/modules/cjs/loader:1105:14)
    at Module.m._compile (..../node_modules/ts-node/src/index.ts:1597:23)
    at Module._extensions..js (node:internal/modules/cjs/loader:1159:10)
    at Object.require.extensions.<computed> [as .ts] (..../node_modules/ts-node/src/index.ts:1600:12)

[ivan-tymoshenko]

FWIW, I think I encountered this issue too while using a schema similar to this (observed in 5.0.4, unrelated to #479):

Does it work with this fix?

[smonn]

Does it work with this fix?

Yep! #482 fixes it for me too.