ajv-validator
Disable coercion enterily or selectively at global and local levels
What version of Ajv you are you using?
7.0.3
What problem do you want to solve?
In some circumstances, I wish to disable the coercion of a property. Take for example a timestamp defined as a number. If the user provides a boolean value, I expect a validation error to be thrown and not the value true to be converted to 1 which is a valid but incorrect timestamp:
const assert = require('assert')
const Ajv = require("ajv").default;
const data = {
timestamp: true
};
const ajv = new Ajv({
coerceTypes: true
})
validate = ajv.compile({
"type": "object",
"properties": {
"timestamp": {
"type": "integer"
}
}
})
error = validate(data)
// Expect an error instead of `1`
assert.equal(data.timestamp, 1)
What do you think is the correct solution to problem?
My expectation is the ability to entirely or selectively disable some coercion rules, either at a global level when AJV is instantiated or at a local level when the property is defined.
At a global level:
const ajv = new Ajv({
coerceTypes: {
// all coercion rules are enabled by default beside the ones declared:
boolean_to_integer: false
}
})
At a local level:
ajv.compile({
"type": "object",
"properties": {
"timestamp": {
"coercion": false
"type": "integer"
}
}
})
Will you be able to implement it?
Maybe with some guidelines
To be honest I am not very supportive of this feature - it would add a lot of complexity, and there doesn't seem to be a lot of interest...
Would it be possible to simply expose a hook where we could implement our own coercion rule, I have many situation where implementing my own coersion or no coersion at all would be trivial if i could just plug my own function.
