Mongodb change field type from double to int
I am trying to change the type of a field from within the mongo shell. Show I am doing this...
But it's not working!
Xavier Guihot 47.3k21 gold badges264 silver badges168 bronze badges asked Feb 11, 2011 at 19:18
1 The only way to change the In this case, it looks like you're trying to change the So simply load the document from the DB, perform the cast ( If you need to do this programmatically and entirely from the shell, you can use the In response to the second comment below. Change the field
user6039980 2,8388 gold badges28 silver badges56 bronze badges answered Feb 11, 2011 at 20:21
Gates VPGates VP 44.6k11 gold badges102 silver badges107 bronze badges 11 Convert String field to Integer:
Convert Integer field to String:
answered Oct 17, 2011 at 15:45
SimoneSimone 1,7391 gold badge10 silver badges2 bronze badges 7 Starting
In case your cast isn't from double to string, you have the choice between different conversion operators introduced in And if there isn't a dedicated converter for your targeted type, you can replace
answered Jun 12, 2019 at 20:43
Xavier GuihotXavier Guihot 47.3k21 gold badges264 silver badges168 bronze badges 3 For string to int conversion.
For string to double conversion.
For float:
answered Mar 17, 2012 at 0:35
David DehghanDavid Dehghan 19.6k8 gold badges100 silver badges90 bronze badges 3
answered Apr 12, 2012 at 13:01
RussellRussell 2693 silver badges2 bronze badges 0 all answers so far use some version of forEach, iterating over all collection elements client-side. However, you could use MongoDB's server-side processing by using aggregate pipeline and $out stage as :
example:
answered Sep 3, 2018 at 12:39
user3616725user3616725 3,2731 gold badge16 silver badges26 bronze badges 1 To convert a field of string type to date field, you would need to iterate the cursor returned by the Take advantage of using the Bulk API for bulk updates which offer better performance as you will be sending the operations to the server in batches of say 1000 which gives you a better performance as you are not sending every request to the server, just once in every 1000 requests. The following demonstrates this approach, the first example uses the Bulk API available in MongoDB versions
The next example applies to the new MongoDB version
answered Jan 22, 2016 at 11:44
chridamchridam 97k21 gold badges223 silver badges226 bronze badges 1 To convert int32 to string in mongo without creating an array just add "" to your number :-)
answered Oct 3, 2014 at 14:19
Giulio RoggeroGiulio Roggero 1,6621 gold badge16 silver badges11 bronze badges What really helped me to change the type of the object in MondoDB was just this simple line, perhaps mentioned before here...:
Users are my collection and age is the object which had a string instead of an integer (int32). answered Mar 28, 2017 at 5:46
FelipeFelipe 10110 bronze badges 0
Try this query..
answered Jan 25, 2017 at 13:40
I need to change datatype of multiple fields in the collection, so I used the following to make multiple data type changes in the collection of documents. Answer to an old question but may be helpful for others.
answered Jan 20, 2016 at 9:55
AakashAakash 2312 silver badges13 bronze badges demo change type of field mid from string to mongo objectId using mongoose
Mongo ObjectId is just another example of such styles as Number, string, boolean that hope the answer will help someone else.
Pang 9,192146 gold badges85 silver badges118 bronze badges answered Aug 26, 2017 at 3:40
I use this script in mongodb console for string to float conversions...
And this one in php)))
answered Apr 3, 2014 at 9:25
How do I change the value of a field in MongoDB?MongoDB Update() Document with Example. Step 1) Issue the update command.. Step 2) Choose the condition which you want to use to decide which document needs to be updated. ... . Step 3) Use the set command to modify the Field Name.. Step 4) Choose which Field Name you want to modify and enter the new value accordingly.. Output:. How do I change the ID field in MongoDB?How to update the _id of a MongoDB Document?. Step1: In the first step, you need to store ObjectId into a variable.. Step 2: In the second step, you need to set a new id.. Step 3: In the third step, you need to insert new id on a document.. Step 4: In the fourth step, you need to remove the old id.. What is double data type in MongoDB?Double: The double data type is used to store the floating-point values. Example: In the following example we are storing the marks of the student in the student collection: 4. Boolean: The boolean data type is used to store either true or false.
What is $type in MongoDB?$type selects documents where the value of the field is an instance of the specified BSON type(s). Querying by data type is useful when dealing with highly unstructured data where data types are not predictable. A $type expression for a single BSON type has the following syntax: Changed in version 3.2.
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