mongodb - What is the easiest way to check for record with two criteria, insert if it doesn't exist, if one or multiple exist, update them all -

-

A cursed time is taking me to do a query.

Building_id, username and correct.

We need to see that there is a record for a user and a particular building (because they can only have one vote).

If it does not exist, then we need it to enter a new record with Building_ID, username and correct.

If this is present, then we have to find the record of building_id and usernames and correct updates to be the new vote.

I am playing with saving, updating, receiving or receiving, and they keep popping up all the errors, how will this be done in Mongoengin?

You can use a simple update, set upset and correct many :

Syntax is similar to: 

  db.collection.update (& lt; query & gt ;, & lt; update & Gt; Upgrade: & lt; boolean & gt; Multi: & lt; boolean & gt;}) Regarding the investigation of two criteria, the amount of as much as you want in your query Might be possible.  
 I do not know its collection, but may be:  
  db.yourCollection.update ({"user": "some users", "build indead" : "Some Building ID"}, {"true": "your correction"}, {upert: true, multiple: true})

Comments

Post a Comment

Popular posts from this blog

excel vba - How to delete Solver(SOLVER.XLAM) code -

-
After opening several examples of macro / code written, I suddenly get stuck with a code that seems safe. Solver (SOLVER.XLAM) is doing this notation and I would like to remove it from my system. I do not think this is a relativant code. Can anyone tell me what should I do? I have already installed something to remove the password but Solver is still asking for password and I can not get rid of it! itemprop = "text"> Solver Excel is add-in If you want to delete it, then Excel Application & gt; Options & gt; Add-ins & gt; Search for 'Go to' button and gt; Uncheck the solver on the list like press something (I can not give you the exact path because I have the Polish version of Excel). Trying to open Solver's VBA code is not good because it There is allegedly copyright. Besides, I do not think Solver creates any disadvantages while working with Excel or VBA.
Read more

github - Teamcity & Git - PR merge builds - anyway to get HEAD commit hash? -

-
I have a team city build project with Gitbab VCS route, I have been triggered for both / head on PR and / Merge the referee. The annoying thing is that you can not do anything useful with the merged hash - it is not present in Gitobb. I want to exclude newsgate packages with head in gutub comet situations in the version number along with Hewash (Newsaging 7) for the music build, but against head hash. However, I can not see a way to get the head hashes while constructing that merge. I just want to head because it's useless - we only care about merge. (PR - Pull Request) This command works reliably while running One on / merge is git log --no-merge -1 ---- = '% h'
Read more

ios - Replace text in UITextView run slowly -

-
I have a UITextView and I change a word like the code at the end of UITextView.text: - (void) Replace TexttechWitWord: (NSString *) word {NSString * currentTextViewText = self.textView.text; CurrentTextViewText = [currentTextViewText stringByReplacingCharactersInRange: NSMakeRange ([self.textView.text length] - [word length], [word length]) withString: word; Self.textView.text = currentTextViewText; } Replacement work is fine, but it runs very slowly and very slowly when the textView now lengthens Is there any better way? I try the replacement range: with text for a week but still stuck. Not to know how to use it to replace it in your case. Please guide! Thanks in advance! This is an important job. As you are using an irreversible string and you are creating a very long string and before Assigned to NSString created from. NSString will be used instead of NSMutableString . - (UITableViewCell *) TableView: (UITableView *) Table View CellForOutPath: (NSIndex...
Read more