This is kind of example.
Let's have an @Entity with field
In flow, there is action handling, according to manual section:
@NotBlank(message = "You have to upload your avatar")
private String avatar;
The problem is, model comes through validation before this "<evaluate>" is reached, and so the field avatar cannot be filled up with URL, and so the validation fails.
<transition on="proceed" to="company">
<evaluate expression="registerService.uploadAvatar(flowScope.userModel, fileUploadHandler)"
I'd like to validate model on transition but after processing this "<evaluate>"
How can we do it?