Flask Framework Cookbook - Second Edition

How to do it...

The following is the decorator method that we have written for this recipe:

from functools import wraps 
 
def template_or_json(template=None): 
    """"Return a dict from your view and this will either 
    pass it to a template or render json. Use like: 
  
    @template_or_json('template.html') 
    """ 
    def decorated(f): 
        @wraps(f) 
        def decorated_fn(*args, **kwargs): 
            ctx = f(*args, **kwargs) 
            if request.is_xhr or not template: 
                return jsonify(ctx) 
            else: 
                return render_template(template, **ctx) 
        return decorated_fn 
    return decorated 

This decorator simply does what we did in the previous recipe to handle XHR; that is, checking whether our request is XHR and, based on the outcome, either rendering the template or returning JSON data.

Now, let's apply this ...