Adding custom keyword through ajv "unique" , need to access repository.

[jashanbaatth]

Describe the bug

I am adding custom keyword "unique" in loopback 4. It will check whether the entered value is present in db or not.

How can I access repository or request context in "unique" keyword definition or validation.

Logs

No response

Additional information

No response

Reproduction

https://ajv.js.org/guide/async-validation.html

[benjaminrae]

Have you tried defining properties as unique on the model?

I believe you can do something like this, at least with Postgres, I don't know if it works in all connectors

    @property({
      type: 'string',
      index: {
        unique: true,
      },
    })
    property: string;

[jashanbaatth]

I want to create a custom keyword, in which I can access repository to run some query. I am using mongodb.

@Property({
type: 'string',
jsonSchema: {
customKeyword: true,
},
})
property: string;

keyword definition :-

ctx
.bind('ajv.keywords.smallNumber')
.to({
name: 'smallNumber', // name of the keyword
type: 'number',
validate: (schema: unknown, data: number) => {
// The number is smaller than 10
const data = async this.repo.find({where:{conditions}});
return !!data;
},
})
.tag(RestTags.AJV_KEYWORD);

I want to do something like this