mongoose Mongoose Middleware
Remarks
In mongoose, Middlewares are also called as pre and post hooks.
There are two types of middleware
Both of these middleware support pre and post hooks.
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Document middleware
Its supported for document functions
init,validate,saveandremove
-
Query middleware
Its supported for query functions
count,find,findOne,findOneAndRemove,findOneAndUpdate,insertManyandupdate.
Pre and Post hooks
There are two types of Pre hooks
-
serial
As the name suggests, Its executed in serial order i..e one after another
-
parallel
Parallel middleware offers more fine-grained flow control and the
hooked methodis not executed untildoneis called by all parallel middleware.
Post Middleware are executed after the hooked method and all of its pre middleware have been completed.
hooked methods are the functions supported by document middleware. init, validate, save, remove
