Support searching by multiple platforms - #119
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chuckwondo merged 2 commits intoAug 23, 2026
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- Update platform() method in GranuleCollectionBaseQuery to accept Union[str, Sequence[str]] - Backward compatible: single string works as before - Multiple platforms passed as list for proper URL formatting (platform[]=...) - Add ValueError for empty/falsy platform values - Add tests for single, multiple, and empty platform cases in both CollectionQuery and GranuleQuery - Update CHANGELOG.md with new feature Closes nasa#80 Co-authored-by: Suhas <suhaslord@users.noreply.github.com>
chuckwondo
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Aug 22, 2026
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Thanks @suhaslord! Generally looks good, but I've suggested a simplification.
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| # Handle string vs sequence of strings | ||
| if isinstance(platform, str): | ||
| self.params['platform'] = platform | ||
| else: | ||
| # Convert sequence to list for proper URL formatting | ||
| platform_list = list(platform) | ||
| if not platform_list: | ||
| raise ValueError("Please provide a value for platform") | ||
| self.params['platform'] = platform_list |
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This should be sufficient, although the existing implementation worked fine if the user passed a list. This simply ensures that a list is constructed for other sequence types since the _build_url method looks specifically for lists when dealing with multiple values:
Suggested change
| # Handle string vs sequence of strings | |
| if isinstance(platform, str): | |
| self.params['platform'] = platform | |
| else: | |
| # Convert sequence to list for proper URL formatting | |
| platform_list = list(platform) | |
| if not platform_list: | |
| raise ValueError("Please provide a value for platform") | |
| self.params['platform'] = platform_list | |
| self.params['platform'] = ( | |
| platform if isinstance(platform, str) else list(platform) | |
| ) |
Apply Chuck Daniels' suggestion to simplify the string-vs-sequence handling. The new implementation keeps the string case as-is and converts any sequence type to list in a single expression. This ensures other sequence types (tuples, etc.) become lists since _build_url specifically looks for list instances when formatting multi-valued parameters. Co-authored-by: Suhas <suhaslord@users.noreply.github.com>
chuckwondo
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Aug 23, 2026
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Thank you @suhaslord!
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Summary
Implements support for searching by multiple platforms for both
CollectionQueryandGranuleQuery, as requested in issue #80.Changes
Code
cmr/queries.py: Updatedplatform()inGranuleCollectionBaseQueryto acceptUnion[str, Sequence[str]]params['platform'] = platform)platform[]=query paramsValueErrorTests
tests/test_collection.py/tests/test_granule.py: multi-platform + empty-list tests; existing single-platform tests still passDocs
CHANGELOG.md: Unreleased entry for multi-platform supportBehavior
All 129 tests pass.
Closes #80
Submitted from fork as requested by @chuckwondo.