How to search text in MongoDB

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Thomas Dufresne
Thomas Dufresne 2020-2-27
编辑： Ralf Elsas 2020-4-7
MongoDB allows you search for a word in the database
db.articles.find( { $text: { $search: "coffee" } } )
There doesn't seem to be an equivalent in matlab's interface to MongoDB.
Any thoughts on how to search for a string in the database?

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回答（1 个）

Nipun Katyal
Nipun Katyal 2020-3-3
Make sure you have a proper installation of MongoDB and the corresponding support packages in matlab
To connect to an existing database here is the link to the documentation
https://www.mathworks.com/help/database/ug/database-toolbox-interface-for-mongodb-installation.html
https://www.mathworks.com/help/database/ug/mongo.html
To connect to an existing database
server = "dbtb01";
port = 27017;
dbname = "mongotest";
conn = mongo(server,port,dbname)
To execute a search query
collection = "employee";
mongoquery = '{"department":"Sales"}';
documents = find(conn,collection,'Query',mongoquery);
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Thomas Dufresne
Thomas Dufresne 2020-3-6
Thanks for your response. I was hoping to find a way that can actually search the database first for the occurrence of a text string, as opposed to pulling everything into matlab and then searching for a text string within a structure. It appears that MongoDB can search for a string within the database, but that not feature is not available in the matlab implementation.
Ralf Elsas
Ralf Elsas 2020-4-7
编辑：Ralf Elsas 2020-4-7
Hi, I was just bothering with the same problem.
A solution I have found is to use the $regex command in the find function:
mongoquery = '{"label": {$regex: "pay"}}'
finds all documents where the text variable "label" contains "pay", using find(conn,collection,'Query',mongoquery).
Hope this helps.

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