Add option to metabolite full text search results to only return metabolites with concentration data

[jonrkarr]

Example:

• https://api.datanator.info/metabolites/concentrations/similar_compounds/?inchikey=BJHIKXHVCXFQLS-UYFOZJQFSA-N&threshold=0.6&taxon_distance=false
• RNBGYGVWRKECFJ-ZXXMMSQZSA-N
• HMFHBZSHGGEWLO-SOOFDHNKSA-N
• UXNHAIRVTPGNPL-KVTDHHQDSA-N
• OXGUIUWFXGIWNM-TXICZTDVSA-N
• RITBIFGLPRFTSB-KVTDHHQDSA-N

If there's no data, shouldn't this be excluded from the full-text search results?

[lzy7071]

Did you mean /ftx/text_search/num_of_index/ or /metabolites/concentrations/similar_compounds/?

• With regards to /ftx/text_search/num_of_index/, it should return results regardless of if the metabolite itself contains concentration information or not precisely because of the function offered by /metabolites/concentrations/similar_compounds/ endpoint. An abstract example would be if a user searches for glucose, for which we don't have concentration information. However, we do have concentration information for fructose, and presumably fructose is structually similar to glucose. If we filtered out glucose at the full-text stage, the user would not have seen glucose in the intermediate stage under Metabolites, which could lead the user to believe we have absolutely no information, including various meta info, on glucose. It would also remove the possibility for the user to choose concentration information from the structually similar compound, fructose

• With regards to /metabolites/concentrations/similar_compounds/. https://api.datanator.info/metabolites/concentrations/similar_compounds/?inchikey=BJHIKXHVCXFQLS-UYFOZJQFSA-N&threshold=0.6&taxon_distance=false returns an empty array because none of the similar compounds, including the compound itself (BJHIKXHVCXFQLS-UYFOZJQFSA-N), within the tanimoto threshold value have concentration information. But it cannot be known at the full-text search stage. It was originally conceived that the threshold value is user defined, which isn't done until the metabolite-specific page.

[jonrkarr]

This is similar to #89. Upon further reflection, I think its useful for Datanator to explicitly communicate to users that we do not have relevant data about a metabolite.

After we finish debugging, we can add an option to the full text search and UI to only return results that have data.