Currently, I have a Node.js server set up with Express and Mongoose. My goal is to implement a search functionality using the GET method based on specific criteria provided as a JSON object. Can anyone assist me in implementing this feature?
Alternatively, should I consider using POST or PUT for this purpose instead?
https://website/model?param1=1¶m2=2router.route('/model')
.get(function (req, res, next) {
req.query.param1 === 1 // returns true
req.query.param2 === 2 // returns true
});
If you find yourself unsure about which HTTP VERB to utilize,
POST - is mainly employed for generating new resources on the server
PUT - is leveraged for modifying existing resources
GET- is ideal for fetching a specific resource
In this scenario, I would opt for using the GET method
GET http://myhost.com?q=word1+word2+word3+word4
app.get('*', function(req, res) {
// perform actions with the req.query.q array
});
There are two different approaches available to you - one involves using HTTP GET parameters, while the other entails encoding the entire criteria as a JSON string and then passing this string.
The first option utilizes params:
?crit[foo.bar][$eq]=abc&crit[foo.baz][$ne]=def
In nodejs/express, you can access this data via req.query.crit. However, it's important to note that this method has its drawbacks - namely, the inability to preserve data types. For instance, a number like 1 may be converted into a string like "1".
Avoid using this method since MongoDB is sensitive to data types, meaning that a query like {"foo.bar":{$eq:1}} differs significantly from {"foo.bar":{$eq:"1"}}.
The second option involves URL-encoding JSON criteria:
?critJSON=%7B%22foo.bar%22%3A%7B%22%24eq%22%3A%20%22abc%22%7D%2C%22foo.baz%22%3A%7B%22%24ne%22%3A%20%22def%22%7D%7D
You can then parse this on the nodejs/express side:
var crit = JSON.parse(req.query.critJSON)
This approach ensures that your data types remain intact and will function as expected.
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