Aggregate Extension Filter Attribute Missing #357
Description
Describe the bug
The aggregate extension is looking for aggregate_request.filter attribute in multiple locations, however this no longer exists in the stac-fastapi package. Instead, the package uses an alias when setting this attribute, but it is then only accessible using the filter_expr attribute instead.
To Reproduce
Attempt to visit the /aggregate?aggregations=total_count endpoint as an example, and seeing the following response:
{"code":"AttributeError","description":"'EsAggregationExtensionPostRequest' object has no attribute 'filter'"}
Expected behavior
It should be able to read the filter definition directly from the class. However, it will need to use the actual attribute name, filter_expr, rather than the alias, filter.
Desktop (please complete the following information):
- OS: Ubuntu
- Browser: Firefox
Additional context
Expect we just need to update any references to aggregate_request.filter to be updated to aggregate_request.filter_expr in the aggregate extension.