Node.js FS Module: Complete Guide to CRUD Operations & File Renaming (Sync)

Hello what's up guys today in this video we will see FS module in our nut j application yes guys today's video is going to be very awesome and if you have n't checked out the previous videos then definitely check them out guys today we Finally we are going to see the FS module which is called your file system module and this is a very important model because finally now how can you read the content of any file in your system. How can you update its data or any file, how can you delete it, how can you change the name of files and folders, how can you add data to it or update it. You can append, you can do all this, basically this module is going to give you the fun of playing with the file system and this is very important. Guys, it is very important in believe, so please read it. You will definitely watch till the end because it is very useful in big projects, so first of all let me tell you, although what I told, it is written here also, it is a file system module in the nut, which comes inside the core module. That allows you to work with the file system enabling you to read write update delete and watch the files and we today in this video I am going to tell you the complete code operation, create the files and also read them. I will also update and then delete it and show it, then all your doubts will be cleared, so guys, without any delay, now let's start the video, but before that, thank you so much, I am watching the comments, very good comments, day four present sir. Day Five Present Sir Day Six Present Sir By doing this today I don't know what day it is but whatever it is guys I feel very happy and please keep your love like this End Channel Don't forget to subscribe. Okay, so I'll go to my VS Code editor. You can see that I have already given the definition of how we can do this right here. I thought I would ask you to give each and every thing definition with syntax. A further definition of what the particular arguments we are passing in that syntax means so that you are left with no room for doubt. That's it, make a video, but if there is no one, then look at the guys in the curd operation, CRUD, okay, so we will perform one thing, just yes, keep one thing in mind here, now we will start one thing, this is what is in the file system here. One is your synchronous method and the other is your asynchronous method which we do through call back but in JavaScript you have already learned that like call back hell is also a topic due to which we call like promise. To simplify the write and then promise further, we used like a sync await hai na to yahan pe bhi kuch vo funda hai to every day we will perform the curd operation but in a different way, today I will tell you using A Synchronous Way Tomorrow we will see again curd operation but using an asynchronous way which is best non blocking but with the help of call back then we will see again your Card operation but with the help of promise is a different world then finally I will tell you how you can do card operation with the help of promise in your FS module so these four videos are very important you should not miss them at all You can't do it literally, all the videos from here are very important and today in this I will give you some glimpses of the previous models that we read and I will ask you questions. We do n't have to sit, we have to practice also, okay, so see, first of all we have to create a file, okay, now you can see very clearly, look carefully once, if you feel it carefully then pause, we have this FS folder, currently only There is a file and there are so many files here, okay, I would like to create a new file here, whose name will be FS Sync, meaning we are doing FS in a synchronous manner, okay and again one more time is not here. Here There is no OK sync FS is there but FS sync is not there I do one thing na text text speaking test data one thing I create the file okay so see carefully now how we can do so FS module basically with this module To play we need to go with the fs. Now I won't get any suggestion here Antya so request it right like we were doing with path, if we were doing with dew then const fs. Will be we need to request the FS or this is it so okay this is my work now here I will go and then press dot then boom guys see you will see multiple suggestions here you can see very clearly that one you It is visible that the read file is sync, right, see one thing here, look carefully, this is your synchronous because here there is sync and same perform I mean to perform this operation we have one. More method called read file which is your asynchronous method okay so right now what we are looking at is the synchronous method so FS dot we have a write we have a file and then sync now here you can see the first file in the argument Path the file path to write to means now here you have to give the path of the file where you want to add this data. Now there are some things here too, this is the path of the file. If that file does not exist then it automatically creates a new file then it basically adds the include to the data you pass and then we have this option basically the format of coding is like mostly this is If you want a very deep video, then click on this particular option only because a very big video can be made on this, even you can see the image, we have 8 likes. The base is 24, it is ASCII, it is Haxe, it is full, but there is none, it is just one encoding method, I hope you understand, so let me do one thing, I would like to create a file with lets, const a file, I will give the name of it. Test here txt.gz This is the initial ok, initial is not commit, I am writing a comment, but let's go, there is no git hup, there is a little end comma here, UT is an encoded format, ok. Which is also very important, one second I guess, I pressed insert, everything is fine here, UTF is not a problem now and don't worry, it has a full form which I would like to keep, it is 8 bit Unicode transformation format and codes characters from near. All written languages, symbols and then emojis are fine, I will do one thing, I will put it above and comment, right now I don't need it that much, but or Whatever you understand, now I add it at one place, basically stores right file, it is okay, it was not a big deal, I have to create a file or I have to add some data in a file, then what is the name of the file, basically the path? What data do I have to add and in which format do I have to add it? This is it, so let's go with Kasol Dlog and let's go with write file. Okay, perfect, okay, I go here, clear everything. First, here I would like to share one thing, test data is not visible anywhere here, okay, that's good, now I go here, not within a second advance, it's a note, first, what is here? Ok CD node Thapa, there is something inside it, there are many of them, so what are we inside, we are inside FS, so we have FS, okay, there is something inside it, okay, this is basically, I have to run this file, okay, so node end sink FS C I am getting undefined guys, I am getting undefined but the beauty is now you can see very clearly and that is key test dot t one this is a particular file which is ready here I did not do anything I did something No, I just made it, I would like to go here and this is the initial data, my data is ready, my data is very easily created here, now you can do it in another way also. And in a better way and that's it, I take one more deliberately cost let's go with path module, although I needed it when I was practicing, but now I released a trick that if you go to that particular folder. If it was already inside then there was no need to work so hard but if there is no one then I will go here, the path is fine so const file path will be equal to we have a path dot join we had studied yesterday itself so I want to make sure that I basically whatever this folder of mine is okay we have directory name comma and this file name in it I want to make sure that if I ever want If I go to any file and run this code, then basically I go inside that particular folder and create it. Okay, now the file name, now sorry, now let me put it here in the file path. So, if I give you this path module, we had seen it very well in that video, it is basically joining and nothing else, even if it seems difficult, I will add this for you all for a moment, okay. So now look carefully at the data that is there at the moment, this data is given back to me, I do one thing, I write it here, it is updated, it is ok because at the moment there is something updated here, otherwise what happens, now let us see that. Look carefully at one thing that I Han Han doctor name was written, right, I got this from FS, OK right, I got this from FS, now I will go to CV have this updated, so in this way, guys, this is your right which does this work of file sync, if the file does not exist, If it does, it creates it and we can add data there. Alright, perfect, it is done that if the file is not there then how to create it, how to add the data in it, it does one thing if it is 8 does n't happen, okay and now I am doing it, I go here, I clear it, I hit enter, then see what happens now, let me see, look at this, it still got added, let's go right, whenever you are doing it. Yes, at that time it is not that much of a problem, but it would be better if you write 8, okay, this is my work, but I would like to keep it as it is and I would like to remove the updated one, okay, run it once. If I give it, it is fine, perfect, there is no problem, okay, so we are done with our write file, so my one work is done, let me comment, I will come here, pay now, now we have created the file, we have written it in the file. Whatever data we wanted, we also wrote it. Now we want to read what is the data inside that file, what is the content inside that file, okay, okay, I will go here, so again the same. Thing is like cost let's go with a read file you know and I write here fs3 fi sync ok here if you see then only now data son do not have to add anything in it just you have to give the path of the file which file you want to read. Do you want to read and then in which format of the options do you want to read? These are the two lines, now I am cutting them from here and I am placing them below this at the very top because I like these. Now both of them will be needed everywhere because I do not need this particular file but the path of the file, I have to read the data of this file, that is why I said, look how useful it has become now, we have done FS module, today we are doing but path module, we have done it for a few days. Earlier I had seen but now we have found it so easy, now so I will go here, carefully look at the file path, it is okay, for now, I will write this much and leave it, tomorrow we will log in and then we will have this read the file, okay now I Here I go clear, I clear it and if it starts then I take it to the top and we have a node sync FS and boom guy C. You can see what is happening here. What is happening here is that the data you see. It is giving that bup, basically it is getting in binary format, whatever is the buffer, it is fine, now there are two ways to fix it, first, in which format are you expecting the data, brother, if I want it in string then do two strings. Two, one way is this, okay if you do this then this is the initial data, look at the data, now I have got another way, another way was that you cannot write this to string every time, neither. I copy this, paste it and comment it for you guys and there is another option here, look, they have given the option here and that is encoded, you can use it, so I go here and that is UTF, look at this, there are multiple options, UTF 8 is fine, if you just write this, now you do not need to write all these two strings, you can normally let it be any data, let it be any kind of data, if you do this and boom. C Here you can see that your data is this is the initial data, I have got it ok, so in this way you can write the data and then you can read the data, let's check it. Out further and a second, there will be some extra information here regarding why we are using this, why we are not using this, so guys, you can watch it comfortably by pausing the video, although I will share all this. I will do it now let's check it out that now I do not have to append some data, I have to update the data, okay what to do, I have to update the data, see, what do we use for that, append is a keyword. Which I guess many of you used when you were working in the array of JavaScript and at the end if you had to add something then we used to use append wherever so here we also have this fs dot fs file and then sync sorry so it appends data to a file if the file does not exist it creates the same file if it does not exist it will create the file then here if you syntax If you see, we have the path of a file, data and then options, then the path of the file, then again the content of which file you want to update, the data with which data you want to update the content of that file and then again. We have these options, so I will do one thing, we have already worked so hard, right, we have this particular right code, I would like to come here, okay, now I have already written two lines at the top. So I have written it for you guys, so now instead of write file, append file is ok, your file is ok, now here also we also have to go with the append file and then sync, you are able to see this is the file. Path of I here pay back slush and then end because I told you on the same day whenever you even yes remember if you remember when we were looking at resolves or when we join why I have written join The best part of this join keyword here is that whatever is your machine, depending on the operating system, it uses back slash here like back slash or forward slash because in Windows the path of the file is shown in your back slash. Let's give it a second, I would like to show you again, I am commenting and uncommenting it, okay and for now I will comment it, I just want to show you quickly here, what do you want to say. I am this is it, so see here, whatever this particular slash is visible here, here, here, or here, so how is this, this is a back slash, this is like something like this, this is right but you if you Be it a Mac user or a space character where I want data on a new line, if I don't write this then that guy gets added there, so instead of initial I will go with the updated data. Okay, rest. There is no problem, I write here, append file is ok, perfect so clear and boom guys see this is the initial data coming ok why is it coming I guess read yes ok it is coming from here but well no one this is what we have done It has been appended, let's check it out, I walk here and the exam clock and boom guys see this is the updated data, so we have seen how you can write, how can we read. And then how can we update it? This is very important. You understand that now you are playing with the files which are on the server. You understand that you have to update all the files. Delete is very useful. Friend, this is right so or I will do this, I will comment now at the end and what we need to do is that now we have to delete the file, now we have to delete the file, so after deleting it here, someone Word they did not use which is fine but instead they used unlink what did they use unlink basically separate right so deletes a file by its path and syntax is very easy like you just have to give the path of the file you noticed one thing like Just because we wrote this particular code, now our life has become so easy, you understand the full meaning otherwise you have to work hard, this name is that name, this is this name, that name is like this. That's it but now it's done there is no problem here so this is the path of the file I will come at the bottom so it's like cost file a delete is ok so we have fs dot unlink and then sync is ok and here just find the name of the file friend This is it guys it's not a big deal just so it was easy delete the file okay so I go here and boom guys see now if I go here see this Poor guy, our test is gone, what can we do, right, but there is no one, and there is one more thing that I wanted to show you, and that is, this also comes in handy many times, and that is, let's say that. You have created a file, now we have seen how you can update its data, how you can read it, how you can delete it, but what if you want to change the name of the file or if you want to change the folder. If you want to create They are full of many methods but I told them in such a way that you can know how it is working, what is the path, what is the data, what are the end options, right, you will do the rest, see now. Here we need to rename a file. Now the thing is that the file has now disappeared. From here, no problem, I go to our code which is on the right, I go back to it, control a save, I hit back. If I give a run, it must have come back. Look again, the test has come, it's good. Now, whatever test data is written here, I will update it. This means that it will be known that I have renamed it. Okay all right and by the way it does n't interest me so we go to the bottom okay look so it's like a const rename file and fs dot we have a simple rename sync yes here the rename file is like this No, it is just rename and then sync, it is ok and give the path of the file, basically see here what is the old path, first of all you have to give the old path and then now you have to give the new path, then you can do one thing here that you can do one thing. New updated a file name will be equal to like updated test dot t ext ok and again let's make it lead for a while because we can't update the cost so New update ok, it's fine, do const r do, there is no problem, so I create a const new file and then path, f is like path dot join under underscore, I will add it to whatever directory we have, okay there. If we add this then my work is done, so now my new path name will be this one. Do you understand what I am doing, no big deal, so it's a rename and then file. This is it so much I have done so let's make it clear let's check it out whether the update is done or not now according to me it should be done and boom guys see this you can see very clearly that the updated text I mean sorry or Test d txt.gz got the job done, I hope its actually the same, I will share its link with you in the description below, but in tomorrow's video, now I will tell you this. So what we did today was your synchronous way and tomorrow we will see how you can perform the same piece of code in an asynchronous way with the help of call back functions but that's all for this video today and I really hope you You must have liked the video very much so guys let me know in the comment section how did you like the video then please like the video and share it with your friends and our next. Target is or 8 lakh subscribers and present sir keep the comment coming I like it very much ok so guys I will meet you now till tomorrow's video guys thank you so much take care