I want to validate multiple formly fields with different api calls without creating a custom validator for each scenario. For example in the same form a call to api/bankaccount-check, api/username-check for the username field and the banknumber field.
How create a formly async validation for multiple fields with different api calls?
165 views Asked by Maarten Heideman At
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So I'll created a validation implementation for formly for multiple fields. Where the form service is an depedency for the validation (set in the module providers). This because of the async calls. The validation has a debounce to prevent unnecessary calls to the server. The link of the call can be set in the json powered forms (see example). If te server replies an
data.error
that error will be used as validation message (I'll use ionic). Each new keypress makes a call after the debounce time. So there is a live feedback on the users input.I'll hope someone has benefit of this method. Suggestions for optimalisation are welcome.
The form module looks like this.
To use this in a json powerd form you could use it like this:
The form service is looking like this: