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mongoDB/mongoose: unique if not null
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As of MongoDB v1.8+ you can get the desired behavior of ensuring unique values but allowing multiple docs without the field by setting the sparse option to true when defining the index. As in:
email : {type: String, trim: true, index: true,...
How does “do something OR DIE()” work in PHP?
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nickfnickf
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Vim: Move window left/right?
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edited Jan 28 at 19:14
RTbecard
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What is the use for IHttpHandler.IsReusable?
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edited Feb 10 at 8:22
answered Mar 31 '11 at 14:03
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Get ffmpeg information in friendly way
...xistusIrexistus
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Table Header Views in StoryBoards
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answered Nov 8 '11 at 16:02
Mr RogersMr Rogers
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ALTER TABLE, set null in not null column, PostgreSQL 9.1
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ALTER TABLE person ALTER COLUMN phone DROP NOT NULL;
More details in the manual: http://www.po...
“Add unimplemented methods” feature in the Android Studio
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answered Jun 12 '13 at 8:51
Grzegorz ŻurGrzegorz Żur
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R data formats: RData, Rda, Rds etc
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KenMKenM
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add a comm...
How to check if string input is a number? [duplicate]
...om a string.
– arhuaco
Mar 5 '15 at 8:17
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