refactored filters into their own module and added error handling

geosolutions-it / gfdrr-det

Data Exploration Tool

https://waffle.io/geosolutions-it/gfdrr-det

GNU General Public License v3.0

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Closed ricardogsilva closed 6 years ago

ricardogsilva commented 6 years ago

This PR is connected to #15 It fixes the category filter parameter in two ways:

Multiple categories can be specified by adding the category={cat} multiple times, as in the following example:
```
/gfdrr_det/api/v1/exposures/?category=road_network&category=buildings
```
An error message is thrown in case an invalid category is selected:
```
http://10.0.1.95:8000/gfdrr_det/api/v1/exposures/?category=dummy
```