Allow field selection in variant info queries #108
Description
Description:
Currently, Mobidetails always returns the full set of variant annotations for every query. In many use cases we only need a handful of fields (e.g. gene, consequence, ClinVar status) and don’t want to fetch or process the entire payload each time.
Use case:
• A downstream service needs only HGVS, gene symbol and clinical significance for display.
• A batch script wants only allele frequency and impact score to prioritize variants.
• A biologist performing variant validation needs just the in-silico prediction scores (PolyPhen, SIFT, etc.) or the gnomAD population frequency.
Proposed solution:
Add an optional fields (or select) query parameter to the variant lookup endpoint, e.g.
GET /api/variant/chr1-12345-A-T?fields=hgvs,gene,clinvar
When fields is present, return only the requested keys in the JSON response; otherwise fall back to full output.
Support comma-separated lists and nested fields (e.g. annotations.impact,annotations.polyphen).
Benefits:
• Reduced payload sizes and faster response times for clients that don’t need all data.
• More flexible API tailored to diverse consumer needs.