Backend API REST with NodeJS
Let´s create it from scratch
$ npm init
$ npm install mongoose — save
$ npm install express — save
$ npm install body-parser — save — save-dev
#01 Coding — snippet 01
#Code Snippet 02
Api Server with Mongo DB and the API REST for places implemented
We will invoke with the postman client: Let see that the content-type is application/json to send the json body to the server
We can observe that it is called with a “post” method
And it was inserted to the database:
#03 Insert into the database
Notas about insert
I will add two fields, x and y that don´t belong to the schema:
The result is that x and y are suppress in the insert process to the database:
How to use mongoose model without schema?
With strict in false, we can insert also x,y in the database:
Some highlights about MongoDB:
a) Insert in MongoDB: you don´t need an Schema, but this is a good practice
b) Insert in MognoDB: you can add fields that are not defined in the schema
c) It is interesting to compare a SQL a non SQL table:
from: https://www.mongodb.com/compare/mongodb-mysql
we read:
- Table vs Collection
- Row vs Document
- Column vs Field
- Joins vs Embedded Documents, links (About this point there is a good practice that is link document in the less cardinality direction…)
And the Query Language differences
Other interesting tips about mongoose:
Virtuals: are document properties that you can get and set but that do not get persisted to MongoDB. The getters are useful for formatting or combining fields.
GeoJSON: This is a standard to represent geographic data structures, like lineal, point, etc. MongoDB no only support save this kind of points, but also do specific queries of “near”, “distance”, etc. (geospatial queries: queries for inclusion, intersection and proximity: more info here or may be here)
If I have a little time, I will add some of it to the api.
I will stop the post at this stage, I guess that soon I will add the GeoJSON example
