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Type:
Improvement
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Resolution: Works as Designed
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Priority:
Minor - P4
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None
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Affects Version/s: None
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Component/s: None
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Labels:None
Currently this happens:
Customer.where({"$or"=>[]})
#=> Mongo::Error::OperationFailure: [2:BadValue]: $and/$or/$nor must be a nonempty array (on 127.0.0.1:27017, modern retry, attempt 1)
This is not very user friendly. Here is a very simple example which indicates how this makes application code messy:
# given some dynamic criteria
or_criteria = []
or_criteria << {cond1: :foo} if x
or_criteria << {cond2: :bar} if y
# I end up writing these 5 lines...
if criteria.present?
Customer.where({"$or"=>or_criteria})
else
Customer.none
end
# ...I'd like to do just one line:
Customer.where({"$or"=>or_criteria})
We can consider the following:
- empty $and --> returns none
- empty $or --> returns none, unless chaining then its ignored
- empty $nor --> ignored
This ticket is similar to MONGOID-5030
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- Backlog
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