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Doing a post request only in Front end

 原文  2019-04-17 14:12:21  2   2    javascript/ html/ crud

Question

 $(function() { $("#showMovies").click(function() { $.ajax({ method: "GET", url: "http://localhost:3000/movielist", dataType: "json", success: function(response) { $.each(response, function(i, movie) { const rowText = "<tr>" + "<td>" + movie.idmovielist + "</td>" + "<td>" + movie.name + "</td>" + "<td>" + movie.thumbnail_path + "</td>" + "<td>" + movie.description + "</td>" + "<td>" + movie.year_released + "</td>" + "<td>" + movie.language_released + "</td>" + "<td>" + "<button button id = \\"deleteMovie\\" type=\\"button\\" class=\\"btn btn-danger\\" data-toggle=\\"modal\\" data-target=\\"#exampleModal\\">Delete</button>" + "</td>" + "<td>" + "<button button id = \\"editMovie\\" type=\\"button\\" class=\\"btn btn-danger\\" data-toggle=\\"modal\\" data-target=\\"#exampleModal\\">Edit</button>" + "</td>"; $("#movies").append(rowText); }); } }); }); $("#movieAdded").click(function(a) { let mydata = { idmovielist: $($("#newForm")[0].intNum).val(), name: $($("#newForm")[0].name).val(), thumnail_path: $($("#newForm")[0].thumnail_path).val(), description: $($("#newForm")[0].description).val(), year_released: $($("#newForm")[0].year_released).val(), language_released: $($("#newForm")[0].language_released).val(), } displayMovie(mydata); $("#newForm").trigger("reset"); $("#newForm").toggle(); a.preventDefault(); }); function displayMovie(data) { $.ajax({ method: "POST", url: "http://localhost:3000/movielist/addMovie", dataType: "json", data: data, success: function(data) { console.log(data); } }); } $.ajax({ method: "DELETE", url: "http://localhost:3000/movielist/5", dataType: "json", success: function(data) { $.each(data, function(i, movie) { const rowText = "<tr>" + "<td>" + movie.idmovielist + "</td>" + "<td>" + movie.name + "</td>" + "<td>" + movie.thumbnail_path + "</td>" + "<td>" + movie.description + "</td>" + "<td>" + movie.year_released + "</td>" + "<td>" + movie.language_released + "</td>" + "<td>" + "<button button id = \\"deleteMovie\\" type=\\"button\\" class=\\"btn btn-danger\\" data-toggle=\\"modal\\" data-target=\\"#exampleModal\\">Delete</button>" + "</td>" + "<td>" + "<button button id = \\"editMovie\\" type=\\"button\\" class=\\"btn btn-danger\\" data-toggle=\\"modal\\" data-target=\\"#exampleModal\\">Edit</button>" + "</td>"; $("#movies").append(rowText); }); } }); 
 body { background: #20262E; padding: 20px; font-family: Helvetica; } table { background-color: lightblue; } tbody { font-family: inherit; } html { background-color: lightblue; } #banner-message { background: #fff; border-radius: 4px; padding: 20px; font-size: 25px; text-align: center; transition: all 0.2s; margin: 0 auto; width: 300px; } 
 <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width"> <link href="mystyle.css" rel="stylesheet"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <link href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" rel="stylesheet" /> <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.2/jquery-ui.min.js"></script> <link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.2/themes/smoothness/jquery-ui.css" /> <script src="mycrud.js"></script> </head> <body> <title>My Movies</title> <header> <h1>Movies</h1> <button id="showMovies" type="button" class="btn btn-primary" data-toggle="modal" data-target=#exampleModal>All Movies</button> </header> <div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <h5 class="modal-title" id="exampleModalLabel">Modal title</h5> <button type="button" class="close" data-dismiss="modal" aria-label="Close"> <span aria-hidden="true">&times;</span> </button> </div> <div class="modal-body"> <form id="newForm"> <div class="form-group row"> <label for="idmovielist" class="col-sm-2 col-form-label">idmovielist</label> <div class="col-sm-10"> <input type="text" class="form-control" id="intNum" placeholder="idmovielist"> </div> </div> <div class="form-group row"> <label for="name" class="col-sm-2 col-form-label">name</label> <div class="col-sm-10"> <input type="text" class="form-control" id="name" placeholder="name"> </div> </div> <div class="form-group row"> <label for="thumnail_path" class="col-sm-2 col-form-label">thumnail_path</label> <div class="col-sm-10"> <input type="text" class="form-control" id="thumnail_path" placeholder="thumnail_path"> </div> </div> <div class="form-group row"> <label for="description" class="col-sm-2 col-form-label">description</label> <div class="col-sm-10"> <input type="text" class="form-control" id="description" placeholder="description"> </div> </div> <div class="form-group row"> <label for="year_released" class="col-sm-2 col-form-label">year_released</label> <div class="col-sm-10"> <input type="text" class="form-control" id="year_released" placeholder="year_released"> </div> </div> <div class="form-group row"> <label for="language_released" class="col-sm-2 col-form-label">language_released</label> <div class="col-sm-10"> <input type="text" class="form-control" id="language_released" placeholder="language_released"> </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button> <button id="movieAdded" type="button" class="btn btn-primary" data-toggle="modal" data-target=#exampleModal>Add</button> </div> </form> </div> </div> </div> </div> <button id="movieAdded" type="button" class="btn btn-primary" data-toggle="modal" data-target=#exampleModal>Add</button> <table class="table table-bordered table-hover" width="100%"> <thead style="background-color:#ddd;" class="table-borderless"> <tr> <th>idmovielist</th> <th>name</th> <th>thumnail_path</th> <th>description</th> <th>year_released</th> <th>language_released</th> <th>Action</th> </tr> </thead> <tbody id="movies"> </tbody> </table> </header> </body> </html>

在此输入图像描述

So above is my html css and java-script and also I have a screen shot of my UI I have did a post request back-end and I also executed it in the front end as well when I click the add button the modal form pops up on what things I want to add is there a way I could do a post request only on front end with out having to go back to back end and changing it every-time 

app.post('/movielist/addMovie',(req, res) => {
   mysqlConnection.query("INSERT INTO movielist (`idmovielist`,`name`,`thumnail_path`,`description`,`language_released`,`year_released`) VALUES ('64','DudeLove','wfburfr.jpg','silly','2019','english')",
   req.body,
   (err,rows) => {
     if (!err) {
       res.send("Movie is added");
     } else {
       console.log(err);
     }
  });
});

above is the code of my back end I did and is you see in the Ui the result is their but if I want to add more movies is there a way I could just add movies in the front end with out having to go back all the time to the back end to change it

2 answers

solution1
 0  

 mysqlConnection.query("INSERT INTO movielist (`idmovielist`,`name`,`thumnail_path`,`description`,`language_released`,`year_released`) VALUES ('64','DudeLove','wfburfr.jpg','silly','2019','english')",

You've hard-coded the values to be inserted into your query.

Don't do that. Read the values from the POST request .

solution2
 0 ACCPTED  2019-04-17 15:01:45

As You are using POST method, you have to pass the params in the POST's body and read them on the serverside.
Your clientside is correct - you pass data to the server. 

$.ajax({
   method: "POST",
   url: "http://localhost:3000/movielist/addMovie",
   dataType: "json",
   data: data,
   success: function(data) {
      console.log(data);
   }
});

On the serverside you read POST body data elements using req.body.PARAMNAME ;
As You've passed them as JSON, they will be parsed already.
So now you just put those values into the query dynamically: 

"INSERT INTO movielist (`idmovielist`,`name`) VALUES ('"+req.body.idmovielist+"', '"+req.body.name+"')",

OF COURSE you should escape the strings for SQL injections first. And ID probably shouldn't be passed, but auto-incremented in the database.

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