i have a dropdown box named f_chapter and id is also f_chapter . As it have different choices when user selects one of the choices , in model i can get the input by calling $this->input->post('f_chapter') . But i don't need this , I need the value of the input .
example:
<option value=""></option>
<option value="id1">Chapter1</option>
<option value="id2">Chapter5</option>
...................
Now if i want to grab the value in my model how should i get? as i don't need chapter1 ,chapter5......... rather i need id1,id2 ......... as these are my primary key ,i need them for database query.Please help . Advance thanks.
You will get the values by default without any change. I mean you will only get id1,id2,.. not chapter 1,2..
Related
<select multiple="multiple>
<option th:each="vName : ${variety}"
th:value="${vName}"
th:text="${vName}"
th:selected="${selectedVariety}"></option>
</select>
In the above code "selectedVariety" is a string array sent from controller.
I'm not able to bind the select tag on edit.
And this select tag is not a part of entity table so th:filed="*{selectedVariety}" is not working.
Tried th:attr="selected=${selectedVariety==vName?true:false}">
Not working
On using this "th:selected="${selectedVariety}" every option in the dropdown is getting selected.
What may be the solution??
The option is selected when the value is included to the String array. You'll need following attribute within your <option>:
th:selected="${#arrays.contains(selectedVariety, vName)}"
It returns true (selected) if selectedVariety contains given vName or false (unselected) otherwise.
I would like to select an option in a dropdown using a value in my Model (org.springframework.ui.Model), I know how to do it with th:object and th:field but what if I don't have an object and only a key/value in the model?
I'm using spring boot 2 and thymeleaf 3.
Thank you.
So if I'm understanding the question correctly you want to display values on your drop-down options first ( so that you could select one of them further) based on the selected Model.?
And May I know how you're selecting the Model , is it from UI ?
For example :--
You have selected a value in a HTML option( Values from your Model ), and based on that Selected Value you want to display the values further on another HTML-option which you can select further.
You don't need th:object and/or th:field to dynamically select a option. Just add your options to the model and use the th:selected attribute.
<select ...>
<option ...
th:each="op : ${myOptions}"
th:value="${op.myValueMember}"
th:text="${op.myTextMember}"
th:selected="${op.myTextMember == 'Chimichanga'}"
>
</option>
</select>
I need to setup A form where a user would be signing up to an event but while doing that it will collect the data of the user from their database table automatically while also taking information from the events table and inserting it into another table
What are you using primarily to achieve this at the moment? Are you using PHP? In case of PHP,
if you have a user id on whichever user that is going to fill out the form, then you can use that user id to fetch the information from whatever table that you need, and retrieve the information of the user. You then put those into PHP variables for later use. The only way to know which user is which, is by using sessions. This session can be their user id, which I will go by in this example, simply because it's simple and easy.
The handling of form data can be done by a classic form tag with post method and a submit button. You tell the form whichever page it is to supposed to post to.
It can also be handled by AJAX.
You then put those posts into PHP variables, or use them directly, but I personally prefer to put them into variables for clarification. It can look a bit messy using the post variables directly into your query, as well as the security risks it involves.
What it could look like is something like this:
<?php
/*
Firstly we need our session (this should be set upon logging by using $_SESSION['userId'].
As mentioned before, I am using a user id as our session variable in this example.
*/
/*
Carry over the session.
Use session_start() before anything else in a file to get the session of a user.
*/
session_start();
//Put session into a php variable
//mysql_ syntax:
$userId = mysql_real_escape_string($_SESSION['userId']);
mysqli_ syntax, with $conn being your database connection variable:
$userId = mysqli_real_escape_string($conn, $_SESSION['userId']);
mysqli_ syntax, with $conn being your database connection variable:
$userId = mysqli_real_escape_string($conn, $_SESSION['userId'])
?>
Now what is left, is to construct our form and send that data. Since I personally would prefer to handle the data in another file than the file that contains the form, we're going to tell the form to post to another file. This file will contain our form data, as well as our user data. How we will go by getting our user data is by using the session variable, which conveniently happens to be the user id (which is unique to every user). We can post this with everything else in our form by using a hidden input field carrying the user id variable (just as an example).
<!--
What we do here is make a form that that tells which page it is going to go to
on submit
-->
<form action="/another_page.php" method="POST">
<!-- Our hidden input field, carrying the user id -->
<input type="hidden" name="userId" value="<?php echo $userId; ?>" />
What brand is your current car?:<br />
<input type="text" name="carBrand" placeholder="Brand of your car" />
Tell us a little about yourself:
<textarea rows="4" cols="50" name="summary"></textarea>
Rate your experience, 1-5:
<select name="rating">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
</select>
<br /><br />
<button type="submit" name="submitButton">Submit form!</button>
</form>
Now we go to the other file to handle our data, which we will later put into the second table as per your request.
<?php
//This is our POST variables from our form:
$userId = $_POST['userId'];
$car_brand = $_POST['carBrand'];
$summary = $_POST['summary'];
$rating = $_POST['rating'];
//Now to our SQL, to get there data of our user:
//Put SQL command into a variable
$sql = "SELECT * FROM name_of_user_table WHERE userId='$userId'";
//Put query into a variable with mysql_ syntax:
$result_set = mysql_query($sql);
//Put query into a variable with mysqli_ syntax:
//$conn still being your connection variable
$result_set = mysqli_query($conn, $sql);
//The rows in your table in mysql_ syntax:
$row = mysql_fetch_array($result_set);
//The rows in your table in mysqli_ syntax:
$row = mysqli_fetch_array($conn, $result_set);
/*
Now we can start using our data from the database, and store them into variables.
The variables depends on your fields names in the database.
We basically have the data stored into an array,
where we need to tell the array exactly which index we'd like to use
(in this case which field we'd like to store into a variable).
*/
//Examples:
$variable1 = $row['name_of_field'];
$variable2 = $row['name_of_another_field'];
[...]
?>
Now what is left, is to put everything into your second table, using our variables. Hope this helps :)
It is also very important that you use prepared statements before firing your SQL commands into your database, or at least sanitize the inputs to prevent SQL-injections.
Martin wrote a really comprehensive answer; I'm not saying that it is wrong (how could I? I don't speak PHP); however, as the OP tagged it as Oracle Application Express (not PHP), it might not be the best fit.
Anyway: that looks like a simple task: if signing up to the event is done by pushing a button (why wouldn't it be?), you'd create a process which does the rest of the job. Either write it in the appropriate process property, or create a stored procedure which collects data & inserts it elsewhere and - in the Apex process - call that procedure.
I have an 'array type' dropdown field in my form, e.g:
<select name="category_id[]">
<option value="">Please Select</option>
// more options
</select>
There are 3 of these same fields (hence it being an array type) and they are all optional, but if a value is selected it checks whether it is a valid value as follows:
$rules['category_id'] = 'exists:universities,id';
The problem I'm having is that if the empty option is selected, it is still giving me a validation error, e.g "The selected category is invalid." If I select a valid value I don't get any errors (as expected).
I have tried adding both nullable and sometimes to the validation rule but they don't make any difference. Do I need to do something different with it being an array type field?
If you use "array-like" name for your select, you should use array validation like so:
$rules['category_id.*'] = ['nullable', 'exists:universities,id'];
But if it's not multi select, you can change the name to category_id to make it work
Can you try <option value="" selected disabled>Please select</option>. Also what does dumping $request->category_id give you when no selections are made?
I have a page with 3 combos, 6 dependents inputs text ( if a special value is selected in combo, it will show, otherwise it will hide)
Then, I will have A text fields that is a computed property. Each time an input is changed, it will reevaluate this field value.
So, For instance, My fields are:
GradeIni, GradeFin, Category, AgeCategory, AgeIni, AgeFin , Gender (selects)
isTeam ( Checkbox )
CategoryFullName
So, for example, There is 5 predefines AgeCategory,and the 6th is Custom, when Selected, it show AgeIni and AgeFin
Each time a value is change, CategoryFullName is reevaluated.
My first answered question was how to get values from server.
I knew how to do it with Ajax, but in this case, it was easier to just use Server variable sent by Laravel when pages load.
So, the answer was 2 options:
#foreach ($grades as $grade)
<option ...>{{ $grade }}</option>
#endforeach
Or
<grades :grades="{{ $grades }}"></grades>
So, I would like to use the second one, but it means I have to create a component for each Select Option in my page, which seems a little heavy.
So, I'm a little bit confused about how should I make this page. Is it better by AJAX, is it better to be able to get data from laravel, and o make a component for each list, or is there a better way to do it????
You dont need to use many components. One component and one variable to keep the selected grade are fine.
You can create a component template to display all the grades.
I have created one template with dummy data to show you how you can do it.
<template id="grades-list">
Curently selected: Title {{selected.title}} Value: {{selected.value}}
<select v-model="selected">
<option v-for="grade in grades" :value="grade">{{grade.title}}</option>
</select>
</template>
The component should be registered like this:
Vue.component('grades', {
props: ['grades', 'selected'],
template: '#grades-list'
})
The tricky part is how you will select a default value and keep it synced with the parent. To do so, you can use .sync
<!-- you can use :grades="{{ grades }}" with Blade too-->
<grades :grades="grades" :selected.sync="selectedGrade"></grades>
To set default value you can update the selectedGrade variable when the document is ready, using vm.$set.
new Vue({
el: 'body',
data: {
'selectedGrade': ''
},
ready() {
this.$set('selectedGrade', this.grades[1])
}
})
I have created an example with dummy data here.