How frontend and backend connects

 Frontend : - We send data from frontend 
like from req.body or something            then it goes in database to store the values OR users information


Database to FE
we store all the values of user in db we can store in both atlas as well as in compass
how to FE get the values from database using fetch method which is async defined
async means multitasking 
like we write async await that means 
wait till we created the user in the database -- > after this run next line of the code to get the user 
and 


both the things getting data from the database or (create function in backend)sending data to the databases is done using fetch method of react 

Comments

Post a Comment

Popular posts from this blog

Edtech backend class 4

 whenever their is concept related to data we have to manage that like in our project called studynotion we required to show the UI based on the different types of user  different UI for the Instructor and different for the Student. from where we get information about the user that is --> backend. we have to manage the state so for that we uses state management library called -- > REDUX. steps  1. install the particular package (redux toolkit) 2. create the store  3. wrapped into provider  :- wrapp app component into the provider as all the state will be treated as global variable,  we have to pass store into the provider 4. create slices 5. add into reducers what we do in reducers folder :- take all the slices and combine them if token === null then show login and signup button if token !== null then show add to cart like features frontend -> button -> services -> controller Optional parameter in function --> Order matters a lot 
Read more

BD Class 4 Data Association

 Data Association: -  It is the linkage or co-ordination between two data how they are related to each other and how one data affects other how data is linked to one or other form how we can manage that In blog application we can have 3 schema 1. post 2.like 3.comment this 3 schema can have different values in that  1. post --> title,body,like,comment title and body is independent but like and comment  is referencing to their object/Schema  we can have array of likes and comments so that we can get to know that how many likes one particular post contains similarly with comment 2. like -- > post [array] , user [array] 3. comment --> post[array], user[array]
Read more

Authentication and autherization class 1

 we can authorize and authenticate user using both the methods  cookies JWT both things are sent from server to the client to know user more correctly and understand user more correctly  like we often see in the e-commerce website that whenever add some products in add to cart button  then after restarting browser we can able to see the added cart items  internally this things happen because of cookies only class 2  we can fetch or send also token from  body cookie header  --> it is most secured way to send the token its not necessary all 3 have the token  but from where you wanted to send you can send the token and access that we can user middleware as for the authentication and authorization   like isAdmin, isStudent aur auth we can  do definitely so that's where middleware is used till this date in my knowledge  how we achieve authentication and autherization we send jwt token of user once user is sign up into the ac...
Read more