Question

I want to use values from annotation in CRUD module templates, to utilize HTML5 functions.

e.g.

@Range(min=0, max=10)

public int size;

CRUD module use views/tags/crud/numberField.html to display number field:

#{field 'object.' + _name}
    <label for="${field.id}">
        &{_name}
    </label>
    <input id="${field.id}" type="text" name="${field.name}" value="${params[field.name]?.escape()?.raw() ?: field.error?.message == 'validation.required' ? '' : _value?.escape()?.raw()}" size="5" />
    #{ifError field.name}
        <span class="error">${field.error}</span>
    #{/ifError}
#{/field}

How can I read min/max value from annotation then output as min=”0″ max=”0″ in <input> ?

Answer 1

You can do this by adding methods to the CRUD module’s CRUD.ObjectType.ObjectField inner class that read the annotation values, e.g. something like:

public String getRangeMin() {
    if (!property.field.isAnnotationPresent(Range.class)) {
        return null;
    }
    return property.field.getAnnotation(Range.class).min();
}

Then in crud/views/tags/crud/form.html you can use this in a new tag parameter inside the #{if field.type == 'number'} (note that field is a CRUD.ObjectType.ObjectField here:

#{crud.numberField min:field.min …

The value is then available as _min inside the numberField.html tag.