Hello I want to achieve is to make "Select Form HTML" dynamic using JavaScript, What I mean by that is I expect every time I select a dropdown must be selected the value that I set to that tag.
The data from tag is from database I loop the data using php
ex. 1 src: Get selected value/text from Select on change
This example is 100% working correct but what I need is not to get the value but to assign like sample below next example 2
function handleSelectChange(event) {
var selectElement = event.target;
var value = selectElement.value;
alert(value);
}
<select onchange="handleSelectChange(event)">
<option value="1">one</option>
<option value="2">two</option>
</select>
ex 2 Those function will alert or run everytime I select/Click each of them F1 or F2
<table>
<tr>
<td onclick="myFunction1()">F1</td>
<td onclick="myFunction2()">F2</td>
</tr>
</table>
<script>
// Function 1 will run when I click the F1
function myFunction1() { alert('myFunction1'); }
// Function 2 will run when I click the F2
function myFunction2() { alert('myFunction2'); }
In example 1 As you can see the first example select form html will grab the the value of option tag, right?.
Now In example number 2 it will run the function when I click each of the F1 or F2
So what I need to the program is pass a value from my database to my javaScript function and run it like in alert or example 1 but in "Select tag" HTML version
ex. 3 Here's my query
<form action="">
<select name="customers" id="myId" class="form-control">
<option value="">Select a customer:</option>
<?php
$user_id = 1;
$sql = "SELECT * FROM `myTable` WHERE user_id = '$user_id' Order by create_at DESC";
$result = $mysqli->query($sql);
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc())
{ ?>
<!-- appsFunction('<?php echo $row['colName2']; ?>') << will be the value that should run in console.log -->
<option value="<?php echo $row['id']; ?>" onclick="appsFunction('<?php echo $row['colName2']; ?>')"><?php echo $row['colName1']; ?></option>
<?php }
} else { return false; }
?>
</select>
</form>
ex. 3 part 2 javascript
<script>
function appsFunction(passVar) {
colose.log(passVar);
}
</script>
As you can see in my first example a "Select Tag" HTML when I select dropdown it returns to me a value right?, in second example when I click F1 or F2 it will run the function then return alert, What I need here is When I select the dropdown it will accept the value I pass in function "appsFunction(passVar)" appsFunction('<?php echo $row['colName2']; ?>') from select tag which the value is from my database.. so I need help idea how to do that properly..
NOTE: The function must be run when I select the dropdown, the function must be accept the value I set which from my database it's like totally example number 2 but in Select tag HTML version not just text or html table.
Thanks in advance for solving my problem.
If you register an event handler on the select element itself that listens for change events you will be able to process the selected OPTION and access any value/property associated with it. You cannot assign an event handler directly to an OPTION element as you are trying to do here. You can add as many dataset attributes as you need to the OPTION elements however which you can easily access in the Javascript event handler.
If the value you pass into the SQL statement is to be dynamic ( from a GET or POST request most usually ) you really need to use a Prepared Statement to help mitigate SQL Injection attacks.
As your select menu is making use of only 3 columns from the mytable table you should limit the returned fields to those columns which in turns helps when using a Prepared Statement as you can easily assign the results as variables.
<form name='geronimo'>
<select name="customers" class="form-control">
<option selected hidden disabled>Select a customer:
<?php
$user_id = 1;
$sql="select `id`, `colName1`, `colName2` from `mytable` where user_id = ? order by create_at desc";
$stmt=$mysqli->prepare($sql);
$stmt->bind_param('s',$user_id);
$res=$stmt->execute();
if( $res ){
$stmt->bind_result($id,$col1,$col2);
while( $stmt->fetch() ){
printf('<option value="%s" data-col="%s">%s', $id, $col2, $col1 );
}
$stmt->free_result();
$stmt->close();
}
?>
</select>
</form>
<script>
document.forms.geronimo.customers.addEventListener('change',function(e){
let id=this.value;
let col2=this.dataset.col;
let col1=this.options[this.options.selectedIndex].text;
alert( id + ' ' + col2 + ' ' + col1 )
});
</script>
Related
I have a textarea where I will load the term respective to the value of my select. I'm loading the content to the textarea using .load("load_myinvoices_default_terms.php?id="+id). I can load the content successfully. But when I'm to type on the textarea and then change the selected option, the .load() function wont load anymore.
My hunch is that when I type on the textarea it is put on the value, while on I use the .load it is put on the html.
I just want to be able to type on the textarea and still be able to change it's value when I change the selected option.
invoice.php:
<select id="setDefaultTermSelection" name="invoice_term_id" onChange="load_myinvoices_default_terms();">
<option value="0">Set as new term</option>
<option value="1">Term 1</option>
<option value="2">Term 2</option>
</select>
<textarea id="default_terms" name="invoice_terms" placeholder="Enter your terms and conditions" rows="5"></textarea>
script:
<script type="text/javascript">
function load_myinvoices_default_terms()
{
var id = $("#setDefaultTermSelection").val();
$("#default_terms").load("load_myinvoices_default_terms.php?id="+id);
}
$("#default_terms").keyup(function(e)
{
$("#setDefaultTermSelection").val(0);
});
</script>
load_myinvoices_default_terms.php:
<?php
include ("includes/connection.php");
$id = $_REQUEST['id'];
if($id > 0)
{
$query = "SELECT * FROM terms WHERE user_id = $_SESSION[user_id] AND term_id = $id";
$selectQuery = mysqli_query($con,$query);
$row = mysqli_fetch_array($selectQuery);
echo $row['term_description'];
}
else
echo "";
?>
What's happening is that, when you set your select value programmatically like this: $("#setDefaultTermSelection").val(0);, the event change is not triggered.
onchange only triggers when the user clicks. From MDN:
The change event is fired for <input>, <select>, and <textarea>
elements when a change to the element's value is committed by the
user. Unlike the input event, the change event is not necessarily
fired for each change to an element's value.
But, you can trigger the change manually ("simulating" user click) with the jQuery's trigger() method. Something like this:
$("#setDefaultTermSelection").val("0");
$("#setDefaultTermSelection").trigger("change");
Or (one line):
$("#setDefaultTermSelection").val("0").change();
In the last example, .change() is an alias for .trigger("change")
Some points:
The value inside <option> tag is a string. So, you should set the value with .val("0");.
The event according to specification is actually onchange, and not onChange (capital "C"). However, modern browsers actually accept both ways.
I've solved the problem.
First, I've put these on my script as mrlew suggested.
$("#setDefaultTermSelection").val("0");
$("#setDefaultTermSelection").trigger("change");
then on the load_myinvoices_default_terms.php:
<?php
include ("includes/connection.php");
$id = $_REQUEST['id'];
if($id > 0)
{
$query = "SELECT * FROM terms WHERE user_id = $_SESSION[user_id] AND term_id = $id";
$selectQuery = mysqli_query($con,$query);
$row = mysqli_fetch_array($selectQuery);
$x = $row['term_description'];
json_encode($x);
}
else
echo "";
?>
<script>
var ar = <?php echo json_encode($x) ?>;
$("#default_terms").val(ar);
</script>
tho there are more efficient ways of solving this, so please let me know, thanks :)
As i mention on the question, i want to update one select box if another value in the another select box is selected.
for example:
<select id="makale" size="4"name="formMakale"style="height:7em;width:16em;border:0px;outline:0px;font-size:16px;padding-left:10px;" >
<?php
$authorsQuery = $hb->authors();
foreach($authorsQuery as $v){
echo '<option value="'.$v->id.'">'.$v->name.'-'.count($hb>aticlesbyauthor($v),1000).' yazi</option>';}
?>
</select>
<select id="kategoriSec" size="4" name="formCat"style="height:7em;width:16em;border:0px;outline:0px;fontsize:16px;padding-left:10px;" >
<?php
$catQuery = $hb->db->get_results("SELECT * FROM category");
foreach ($catQuery as $v) {
echo '<option value="'.$v->id.'">'.$v->name.'</option>';
}
?>
if i select something from this select box with id makale, i want to update the options of the select box with id kategorisec.
can you help me?
Thank you.
If you just want to change it on the browsers side, use the onchange event handler.
If you want to update the checkboxes based on server data, you could use ajax or simply use an iframe:
<input onclick="update(this)">
<iframe src="checkboxes.php">Oh ,update your browser</iframe>
<script>
function update(elem){
if(elem.selected){ iframe=document.getElementsByTagName("iframe")[0]
iframe.src="checkboxes.php?select="+elem.value;
}
}
</script>
I've made a select list and filled it with info from a DB. Now i'm trying to make it so whenever you select a different item in the list it calls a javascript function that checks if the selected item/entity (or whatever it's supposed to be called) has a comment or not, and reacts accordingly.
So far I have this, which does work, and only shows the paragraph if the ID of the selected item sent is over 5. However, I don't know how to send the comment that is in the query as the parameter, so that it can then check the length and react.
This is what I have so far:
// Create connection
$conn = mysql_connect("localhost", "root", "admin")
or die("Could not connect: " . mysql_error());
// Selecting the DB
mysql_select_db("tickets") or die("Could not connect: " . mysql_error());
$query = mysql_query("SELECT * FROM tickets order by ID");
$numrows = mysql_num_rows($query);
//I want to change this.value to be the selected item's comment
echo '<select name="Tick" size='.$numrows.' onChange="checkSelectedValue(this.value)">';
while ($row = mysql_fetch_array($query)) {
echo '<option value="'.$row['ID'].'">Comment: '.$row['comments'].' </option>';
}
echo '</select>';
echo '<p id="commentNotifier" style='display:none;'> Selected item has a comment. </p>';
How would I modify this so the parameter of onChange="checkSelectedValue(this.value)" would be the selected item's comment instead of this.value which is, in my case, the ID.
Note that I don't want to change the value of each option to be comments instead of ID.
This is the javascript functon that works with the ID sent, and if it is over 5 it shows the paragraph that's otherwise hidden:
<script type="text/javascript">
function checkSelectedValue(val){
var element=document.getElementById('commentNotifier');
if(val > 5) //I would change this to val.length > 0 to check if comments exists or not
element.style.display='block';
else
element.style.display='none';
}
</script>
Pretty straightforward function. Cheers in advance!
In a pure javascript solution the best answer of this stack would helps : Get selected value in dropdown list using JavaScript?
You can use this to select the comment from the dropdown:
$('#mySelect').find(":selected").text()
But it requires you to use jQuery
Working fiddle: https://jsfiddle.net/b1qjw214/
In pure javascript:
function findElem() {
var elem = document.getElementById("mySelect");
var elemTxt = elem.options[elem.selectedIndex].text;
}
Fiddle: https://jsfiddle.net/dsy3tgmy/
Use data-* attributes and instead of this.value, pass this as argument so that you can deal with element and all its attributes.
Element.dataset returns the object of all the data-* attributes of the element
Try this:
function checkSelectedValue(elem) {
console.log('Value: ' + elem.value);
console.log('Comment: ' + elem.options[elem.selectedIndex].dataset.comment);
}
<script src="http://gh-canon.github.io/stack-snippet-console/console.min.js"></script>
<select onChange="checkSelectedValue(this)">
<option data-comment='Comment goes here' value="volvo">Volvo</option>
<option data-comment='Comment goes here' value="saab">Saab</option>
<option data-comment='Comment goes here' value="mercedes">Mercedes</option>
<option data-comment='Comment goes here' value="audi">Audi</option>
</select>
In my database I have two related fields. The second field depends on the value selected in the first. The relations are:
The function I use in the form of table "conflictos_1" is:
<!--Aquí el javascript para select dependientes-->
<script type="text/javascript">
$(document).ready(function()
{
$("#conflictos1_id_sector_actividad").change(function()
{
var id_sub = $(this).val();
if(id_sub != '')
{
$.ajax
({
type: "POST",
url: '<?php echo url_for('conflictos/subsector'); ?>'+ '?id=' + id_sub,
cache: false,
data: "id_sub="+ id_sub,
success: function(data)
{
$("#conflictos1_id_subsector_actividad").html(data); // but it does not select the value of dropdown list.
}
});
}
else
{
$("#conflictos1_id_subsector_actividad").html("<option value=''>-- No se ha seleccionado subsector --</option>");
}
return false;
});
});
</script>
When I add a new record, everything works fine.
But when I edit a record, the select dependent, does not show "selected" value.
In edit mode, when I look at the field "id_subsector_actividad", the selected value should be, for example, <option value="37 " selected="selected">: This is what I see on my form when I inspect the element created with AJAX's function:
<select name="conflictos1[id_subsector_actividad]" id="conflictos1_id_subsector_actividad">
<option value="29 ">14.1 Meretrices</option>
<option value="30 ">Preparación de alimentos y comedor</option>
<option value="31 ">Seguridad</option>
<option value="37 ">redes sanitarias</option>
</select>
This is what I WANT to see:
<select name="conflictos1[id_subsector_actividad]" id="conflictos1_id_subsector_actividad">
<option value="29 ">14.1 Meretrices</option>
<option value="30 ">Preparación de alimentos y comedor</option>
<option value="31 ">Seguridad</option>
<option value="37 " selected="selected">redes sanitarias</option>
</select>
I use this function to filter records in the table "Subsector_actividad_ta8"(I work with Symfony 1.4 and Doctrine):
public function executeSubsector()
{ $id_sub = $_POST['id_sub'];
$this->subsec= Doctrine_Core::getTable('SubsectorActividadTa8') ->createQuery('a')
->where('a.id_sector = ?', $id_sub)
->execute();
}
My question is: What should I change in the AJAX's function, to display the "selected" value in the second field, when I am editing an existing record?
Maybe with something like:
$("option[value='37']").attr('selected', 'selected');
You have a similar question on: Set selected option of select box
Here the solution I encountered: I've separated the problem in two.
Case 1: New Record
I use the same JQuery function shown above in the question. With the associated function, also shown above. This case was not part of my problem
Case 2: Edit an existing record (here was my problem)
I added for 'id_subsector_actividad' in the widget the property 'table_method'=>'Subsector' associated with the function public function Subsector() (see below code).
In the partial _form.php of conflictos1, I wrote the following code for the field id_subsector_actividad:
<?php if (!$form->getObject()->isNew()): ?>
<?php echo $form['id_subsector_actividad'] ?>
<?php endif; ?>
<?php if ($form->getObject()->isNew()): ?>
<select name="conflictos1[id_subsector_actividad]" id="conflictos1_id_subsector_actividad">
<option value="" selected="selected">Seleccione sub-sector</option>
<?php endif; ?>
In the action.class.php in the conflictos1, I modified the function executeEdit, with the addition of the variable $elsector:
public function executeEdit(sfWebRequest $request)
{
global $elsector;
$this->forward404Unless($conflictos1 = Doctrine_Core::getTable('Conflictos1')->find(array($request->getParameter('id'))), sprintf('Object conflictos1 does not exist (%s).', $request->getParameter('id')));
$elsector= $conflictos1->getIdSectorActividad();
$this->form = new Conflictos1Form($conflictos1);
}
I use $elsector in the following function created in SubsectorActividadTa8Table.class.php
public function Subsector()
{
global $elsector;
if (!is_null($elsector)){
$id_sub=$elsector;
$query= Doctrine_Query::create()
->select('a.id')
->from('SubsectorActividadTa8 a')
->innerJoin('a.Conflictos1 c')
->where('a.id_sector = ?', $id_sub);
return $query->execute();
}
}
Thus, Symfony displayed on the form, the value of field named IdSubsectorActividad, not previously exhibited.
In other words, now when I'm editing a record in the table conflictos1 the field named IdSubsectorActividad shows the correct value, whereas before the form does not show any value.
Now everything works fine!.
There is a model A that has_many B and a form where one can create a new A and
add/remove Bs. I.e. there is a link Add new B that runs some Javascript to insert another partial where one fills in values for B. All works fine.
The problem
Specifying a B is done through selecting the values using a couple of select
boxes. The problem is that depending on a value selected in one, the
collections used in the other selects should be scoped to only show relevant options. It's the classic case
with dynamic select boxes (think country - state select boxes), only with more
select boxes and I'd like all the select boxes to appear initially, so the
user can start from anywhere (select state first and country select box
narrows down its collection to the ones that can be chosen for that state).
Current approach
The Bs are rendered in a table, one B per row and I was thinking that I could
use AJAX to replace the table row (content) after fetching the new collections
from the server. This obviously needs a couple of things in place.
tr tag must have a unique id attribute, so replace_html can be used.
need to have a trigger on change for each select box
need to pass all select boxes' values (for that row) to the server
I'm stuck here, because of the following:
adding a B needs to have something unique to identify the tr tag as well
as all the selects on that row. I can use Time.now.to_i but that won't
work for the Javascript run by the link to add a new B because that will
hardcode the value and all use the same.
not sure if I should go with observe_field or a remote call in the select
form field helper.
how to pick up the values of all selects in one row and pass that remotely
to the server when triggered?
The project I'm working on is Rails 1.2.3 and uses Prototype. Please feel free to post "newer" solutions too, because I'm curious to see different solutions.
Any help on this is highly appreciated. Thanks in advance!
This doesn't answer your entire question but it might get you started. I handle it like this... this is for playlist entry, where the user can add new forms in a div #playlist-entry, and each form is .new_song_form with a hidden field .form_num (which I use in the create.js.erb file to tell it which form to hide/warn of validation errors, which isn't really relevant for you I guess).
var form_counter = 1;
function addSongFields() {
playlistEntry = $('#playlist-entry');
playlistEntry.append("<%= escape_javascript(render :partial => 'playlist_entry_form', :locals => { :schedule_event => #schedule_event, :playlist_entry => PlaylistEntry.new }) %>");
playlistEntry.find('.new_song_form:last').attr('id', 'new_song_form_'+form_counter);
playlistEntry.find('.form_num:last').val('new_song_form_'+form_counter);
}
$(document).ready(function() {
$('#add-song-link').click(function(event) {
event.preventDefault();
addSongFields();
form_counter++;
});
});
This form is a little different because there's no one "major" form to submit, it's a bunch of forms all on one page, but this basic idea might help you. It's not perfect programming - for example I should be passing form_counter as an argument to the function... but it works perfectly.
Dynamic Dependent Select Boxes
How to create dependent drop down list in php? I have searched a lot then implemented this one. This is created using HTML, JS, PHP simple dependent drop down boxes.
I knew it was possible to create a dynamic dependent drop down form using PHP, MySQL, and JavaScript,
but I had never had an excuse to use one before I need to teach to my students.
<?php
$region = $country = $state = $city = null; //declare vars
$conn = mysql_connect('localhost', 'username', 'password');
$db = mysql_select_db('selects',$conn);
if(isset($_GET["region"]) && is_numeric($_GET["region"]))
{
$region = $_GET["region"];
}
if(isset($_GET["country"]) && is_numeric($_GET["country"]))
{
$country = $_GET["country"];
}
if(isset($_GET["state"]) && is_numeric($_GET["state"]))
{
$state = $_GET["state"];
}
if(isset($_GET["city"]) && is_numeric($_GET["city"]))
{
$city = $_GET["city"];
}
?>
<script language="JavaScript">
function autoSubmit()
{
var formObject = document.forms['theForm'];
formObject.submit();
}
</script>
<form name="theForm" method="get">
<!-- REGION SELECTION -->
<select name="region" onChange="autoSubmit();">
<option value="null"></option>
<option VALUE="1" <?php if($region == 1) echo " selected"; ?>>East</option>
<option VALUE="2" <?php if($region == 2) echo " selected"; ?>>West</option>
</select>
<br><br>
<!-- COUNTRY SELECTION BASED ON REGION VALUE -->
<?php
if($region != null && is_numeric($region))
{
?>
<select name="country" onChange="autoSubmit();">
<option VALUE="null"></option>
<?php
//POPULATE DROP DOWN MENU WITH COUNTRIES FROM A GIVEN REGION
$sql = "SELECT COUN_ID, COUN_NAME FROM COUNTRY WHERE RE_ID = $region";
$countries = mysql_query($sql,$conn);
while($row = mysql_fetch_array($countries))
{
echo ("<option VALUE=\"$row[COUN_ID]\" " . ($country == $row["COUN_ID"] ? " selected" : "") . ">$row[COUN_NAME]</option>");
}
?>
</select>
<?php
}
?>
<br><br>
<?php
if($country != null && is_numeric($country) && $region != null)
{
?>
<select name="state" onChange="autoSubmit();">
<option VALUE="null"></option>
<?php
//POPULATE DROP DOWN MENU WITH STATES FROM A GIVEN REGION, COUNTRY
$sql = "SELECT STAT_ID, STAT_NAME FROM states WHERE COUN_ID = $country ";
$states = mysql_query($sql,$conn);
while($row = mysql_fetch_array($states))
{
echo ("<option VALUE=\"$row[STAT_ID]\" " . ($state == $row["STAT_ID"] ? " selected" : "") . ">$row[STAT_NAME]</option>");
}
?>
</select>
<?php
}
?>
<br><br>
<?php
if($state != null && is_numeric($state) && $region != null && $country != null)
{
?>
<select name="city" onChange="autoSubmit();">
<option VALUE="null"></option>
<?php
//POPULATE DROP DOWN MENU WITH CITIES FROM A GIVEN REGION, COUNTRY, STATE
$sql = "SELECT CIT_ID, CITY_NAME FROM CITY WHERE STAT_ID = $state ";
$cities = mysql_query($sql,$conn);
while($row = mysql_fetch_array($cities))
{
echo ("<option VALUE=\"$row[CIT_ID]\" " . ($city == $row["CIT_ID"] ? " selected" : "") . ">$row[CITY_NAME]</option>");
}
?>
</select>
<?php
}
?>
</form>