Updating the code for Express to store JSON data in a database field

Question

Updating the code for Express to store JSON data in a database field

Struggling with setting up my first basic CRUD functionality in Express JS and I can't seem to track down this frustrating bug.

Every time I attempt to update a field, instead of displaying the new data, the JSON from that field is shown on the view.

Here's a snapshot:

Check out the controller gist here: https://gist.github.com/tiansial/2ce28e3c9a25b251ff7c

json mongodb express controller

Answer 1

Answer №1

The functionality of the update method lies in its ability to search for and modify documents without returning the updated documents themselves. Essentially, this means that you can locate documents based on specific criteria without actually making changes to them, as the initial parameter of the update function serves as the search filter. To actually update an existing document with new properties, you would need to utilize the save function.

Below is a modified snippet of your code (not tested):

//PUT request to update a blob by ID
.put(function(req, res) {
    //Locate the document by its unique identifier
    mongoose.model('Email').findById(req.id, function(err, email) {
        //Implement error handling logic
        if (email) {
            // Obtain values from REST or form inputs using their respective "name" attributes
            email.email = req.body.email;
            email.password = req.body.password;
            email.servico = req.body.servico;

            //Save the updated document
            email.save(function(err) {
                if (err) {
                    res.send("An error occurred while updating the information in the database: " + err);
                } 
                else {
                    //For HTML response, redirect back to the original page; alternatively, provide a success message through a new view.
                    res.format({
                        html: function(){
                            res.redirect("/emails");
                        },
                        //For JSON response, display the updated values
                        json: function(){
                            res.json(email);
                        }
                    });
                }
            });
        }
    });
})

Answer 2

The functionality of the update method lies in its ability to search for and modify documents without returning the updated documents themselves. Essentially, this means that you can locate documents based on specific criteria without actually making changes to them, as the initial parameter of the update function serves as the search filter. To actually update an existing document with new properties, you would need to utilize the save function.

Below is a modified snippet of your code (not tested):

//PUT request to update a blob by ID
.put(function(req, res) {
    //Locate the document by its unique identifier
    mongoose.model('Email').findById(req.id, function(err, email) {
        //Implement error handling logic
        if (email) {
            // Obtain values from REST or form inputs using their respective "name" attributes
            email.email = req.body.email;
            email.password = req.body.password;
            email.servico = req.body.servico;

            //Save the updated document
            email.save(function(err) {
                if (err) {
                    res.send("An error occurred while updating the information in the database: " + err);
                } 
                else {
                    //For HTML response, redirect back to the original page; alternatively, provide a success message through a new view.
                    res.format({
                        html: function(){
                            res.redirect("/emails");
                        },
                        //For JSON response, display the updated values
                        json: function(){
                            res.json(email);
                        }
                    });
                }
            });
        }
    });
})

Updating the code for Express to store JSON data in a database field

Answer №1

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