Flask-Restless only accepts arguments that are columns defined in a SQLAlchemy model. I want to take something like blue green and store it in two columns primary_color and secondary_color.
Right now, I am POSTing the data as primary_color (an allowed field) and using a postprocessor to split it into primary_color and secondary_color.
Is it possible to do something cleaner and more semantic, like POST a colors field and then process it afterwards?
Request preprocessors are run before validating the POST data against the model.
Set a preprocessor on the API for POST requests that parses any colors key, altering the data dictionary in-place:
def preprocess_colors(data):
colors = data.pop('colors', None)
if colors is not None:
# set primary and secondary colors
data['primary_color'] = get_primary_color(color)
data['secondary_color'] = get_secondary_color(colors)
You do need to remove the colors key from the dictionary to prevent Flask-Restless from complaining about the key being there.
A postprocessor could never have worked here; these are only called to alter the returned response after the new instance has been created already.
Alternatively, create a SQLAlchemy hybrid attribute on your model named colors that translates colors into primary and secondary colors in a setter.
