You are deploying a new storage system for your mobile application, which is a media streaming service. You decide the best fit is Google Cloud Datastore. You have entities with multiple properties, some of which can take on multiple values. For example, in the entity ‘Movie’ the property ‘actors’ and the property ‘tags’ have multiple values but the property ‘date released’ does not. A typical query would ask for all movies with actor=<actorname> ordered by date_released or all movies with tag=Comedy ordered by date_released. How should you avoid a combinatorial explosion in the number of indexes?
A. Manually configure the index in your index config as follows:
B. Manually configure the index in your index config as follows:
C. Set the following in your entity options: exclude_from_indexes = ‘actors, tags’
D. Set the following in your entity options: exclude_from_indexes = ‘date_published’
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A
C and D seem to be wrong, if you exclude_from_indexes, you will not be able to search using that property.
if we chose B, we have explosion since we mix in an index thousands of actors in dozens of tags with thousands of date publisehd…Now, since it says “or” in the text, we can make two composite indexes to be used in one case or the other. thus A is my choince , Although syntax doesnt look good, missing a -?