I am new to MongoDB and Mongoose.
I am practicing some of the queries with the following Schema and Model:
const articleSchema = mongoose.Schema({
title: String,
content: String,
});
const Article = mongoose.model('article', articleSchema);
Let's say I added the following two documents:
{title: "One", content: "Content One"}
{title: "LongerTitleThanOne", content: "Content Two"}
Which query can I use to find all documents where the "title" length is greater than 3?
I tried the following query but it only works with numbers:
Article.find({title:{$gt:3}}, (err,foundItems)=>{});
Many thanks in advance for your help here.
You can also use aggregation query to achieve the result.
Article.aggregate(
[
{
'$project': {
'titleLength': { '$strLenCP': '$name' }
}
}, {
'$match': {
'titleLength': {
'$gt': 2
}
}
}
])
This is not the best way to do this but it works
I advise you to not use this in production.
First get all your data from you database and store it in a variable then use JavaScript filter function to accomplish your task
For Example
let data = model.find({});
let filter_data = data.filter(data.title.length>8);