crudpluginModified

Rather than taking a mongodb collection as target, CRUD will take a mongoose model plus the JSON payload and will execute the desired action i.e. C, R, U or D...

This will free other services which leverage CRUD to define their data models and route handlers which will internally leverage CRUD functionality.

In summary, this plugging will be the main source or entry point of all CRUD requests?

A good example is USER... this defines 'user' data model with various fields to differntiate between the various types of users (normal, admin, superuser) ..., Take note that USER would also handle the dbase connection.

So USER leverages CRUD by 'importing' it via NPM.

Next it passes the dbase connection and required model into the CRUD 'constructor'.. Then the route handlers would intercept the requests and call the functionality exposed by CRUD

crudpluginModified

Rather than taking a mongodb collection as target, CRUD will take a mongoose model plus the JSON payload and will execute the desired action i.e. C, R, U or D...

This will free other services which leverage CRUD to define their data models and route handlers which will internally leverage CRUD functionality.

In summary, this plugging will be the main source or entry point of all CRUD requests?

To install the plugin into your project:

npm install crudpluginobject --save

To include it into your file

var crudplugin = require('crudpluginobject').CrudPlugin;

For instance if you have a 'User' model, to create a new record for user, assuming the model has a field called 'email' that you want returned on successful creation:

crud.create(req.body.record)
.then(record=>{
   return res.status(200).json(record.email);
}).catch(err => {
  return res.status(500).json("A little error");
})

	crud.deleteRecord(req.body.property, req.body.value)
	.then(user=> {
        if (user)
        {
            return res.status(200).json(user.username);
        }
        else {
            return res.status(500).json("some error");
        }

    }).catch(err => {
        return res.status(500).json("a little error");

    });

req.body.property is the field name and req.body.value is the value i the field you want a match to be deleted.

Take for instance this request structure:

   	{
 	   "property":"email",
       "value" : "[email protected]"
 	}

It would mean delete the record with email equals to [email protected]

Method: getRecordByProperty

Fetching a single record can come in handy with the following snippets:

	crud.getRecordByProperty(req.body.property, req.body.value)
    .then(user => {
        if (user) {
            console.log('Successfully retrieved user ' + user.email);
            return res.status(200).json(user);
        }
        else {
            console.log('Could not find user ');
            return res.status(200).json(false);
        }

    }).catch(err => {
        return res.status(500).json("a little error");
    });

req.body.property is the field name and req.body.value is the value i the field you want a match to be queried.

Take for instance this request structure:

   	{
 	   "property":"username",
       "value" : "daser"
 	}

 It would mean fetch the record with username equals to daser

Method: updateRecords This updates multiple fields in the model given some matching criteria.

 	crud.updateRecords(property, value, ["lastname","firstname"], ["kabam","Jurun"])
    .then(value => {
        return res.status(200).json(value);
    }).catch(err => {
        return res.status(500).json("a little error");

    });

property and value parameters works as previously seen, the third parameter is an array containing field names in the model with a corresponding values in the fourth parameter. Note that validation check is in place to ensure that their is a match otherwise an exception would be thrown.

Method: updateRecord This updates a single field in the model given some matching criteria.

	crud.updateRecord(property, value, "firstname", "Abiodun")
    .then(value => {
        return res.status(200).json(value);
    }).catch(err => {
        return res.status(500).json("a little error");

    });

property and value parameters works as previously seen, based on the matching criteria, we we changing "firstname" to "Abiodun".

Note the difference between: updateRecords and updateRecord (one is plural while the other is singular)