Internal Server Error while doing an insertion in Codeigniter - php

Question

I am working on a simple CRUD application using Codeigniter, and this section of code was working perfectly well until I added more functions.
Here is the problem:
I was adding 3 items to the database from user inputs, and it had no error. But when I added more input fields to get more inputs from the user, I ended up getting an Internal Server Error when I click on the "Add Item" button.
Below is the View Code:
<?php
if ($_SESSION[AppStrings::$NOMENCLATURE] != AppStrings::$SERVICE) {
if ($_SESSION[AppStrings::$SIZE] != AppStrings::$MICRO) {
?>
<form data-toggle="validator" class="form-horizontal form-material" method="post" action="#" onsubmit="addProduct(); return false;">
<div class="form-group m-t-40">
<div class="col-xs-12">
<div class="input-group">
<div class="input-group-addon"><i class="mdi mdi-barcode-scan"></i></div>
<input class="form-control" type="text" required="" placeholder=" <?= $nomenclature ?> Code" id="product_code" required/>
</div>
</div>
</div>
<div class="form-group m-t-40">
<div class="col-md-6">
<input class="form-control" type="text" required="" placeholder="<?= $nomenclature ?> Name" id="product_name" required/>
</div>
<div class="col-md-6">
<div class="input-group">
<div class="input-group-addon"><i class="mdi mdi-currency-ngn"></i></div>
<input class="form-control" type="number" required="" placeholder=" <?= $nomenclature ?> Cost Price" name="product_cp" id="product_cp" required/>
</div>
</div>
</div>
<div class="form-group m-t-40">
<div class="col-md-6">
<div class="input-group">
<div class="input-group-addon"><i class="mdi mdi-currency-ngn"></i></div>
<input class="form-control" type="number" required="" placeholder=" <?= $nomenclature ?> Selling Price" name="product_sp" id="product_sp" required/>
</div>
</div>
</div>
<div class="form-group m-t-40">
<div class="col-md-6">
<textarea class="form-control" type="text" required="" placeholder=" <?= $nomenclature ?> Description" id="product_des" required/></textarea>
</div>
<div class="col-md-6">
<input class="form-control" type="text" required="" placeholder=" <?= $nomenclature ?> Expiry Date" id="product_exp" onfocus="(this.type = 'date')" onblur="if (this.value == '') {
this.type = 'text'
}" required/>
</div>
</div>
<div class="form-group m-t-40">
<div class="col-md-6">
<div class="input-group">
<div class="input-group-addon"><i class="mdi mdi-clipboard-account"></i></div>
<select name="supplier" class="form-control form-control-line" type="text" id="supplier" placeholder="<?= $nomenclature ?> Supplier">
<option value="">Supplier</option>
<?php
foreach ($suppliers as $supplier) {
?>
<option value='<?= $supplier[DbStrings::$SUPPLIER_NAME] ?>'><?= $supplier[DbStrings::$SUPPLIER_NAME] ?></option>
<?php
}
?>
</select>
</div>
</div>
<div class="col-md-6">
<div class="input-group">
<div class="input-group-addon"><i class="mdi mdi-chevron-double-up"></i></div>
<select name="department" class="form-control form-control-line" type="text" id="department" placeholder="<?= $nomenclature ?> Department">
<option value="">Department</option>
<?php
foreach ($departments as $department) {
?>
<option value='<?= $department[DbStrings::$DEPARTMENT_NAME] ?>'><?= $department[DbStrings::$DEPARTMENT_NAME] ?></option>
<?php
}
?>
</select>
</div>
</div>
</div>
<div class="form-group m-t-40">
<div class="col-md-6">
<div class="input-group">
<div class="input-group-addon"><i class="mdi mdi-chevron-up"></i></div>
<select name="sub_departments" class="form-control form-control-line" type="text" id="sub_department" placeholder="<?= $nomenclature ?> Department">
<option value="">Sub-Department</option>
<?php
foreach ($sub_departments as $sub_department) {
?>
<option value='<?= $sub_department[DbStrings::$SUB_DEPARTMENT_NAME] ?>'><?= $sub_department[DbStrings::$SUB_DEPARTMENT_NAME] ?></option>
<?php
}
?>
</select>
</div>
</div>
<div class="col-md-6">
<div class="input-group">
<div class="input-group-addon"><i class="mdi mdi-cash"></i></div>
<input class="form-control" type="number" placeholder=" <?= $nomenclature ?> Vat" id="vat"/>
</div>
</div>
</div>
<div class="form-group text-center m-t-20">
<div class="col-xs-12">
<button class="btn btn-primary btn-login btn-lg btn-block text-uppercase waves-effect waves-light" type="submit" name="product-btn">Add <?= $nomenclature ?></button>
</div>
</div>
</div> <!-- added in the edit -->
</div> <!-- added in the edit -->
</form>
<?php
}
}
?>
Here is the AJAX code:
function addProduct() {
var product_code = $("#product_code").val();
var product_name = $("#product_name").val();
var product_cp = $("#product_cp").val();
var product_sp = $("#product_sp").val();
var product_des = $("#product_des").val();
var product_exp = $("#product_exp").val();
var supplier = $("#supplier").val();
var department = $("#department").val();
var sub_department = $("#sub_department").val();
var vat = $("#vat").val();
var addUrl = "home/addproduct";
addUrl += "/" + product_code;
addUrl += "/" + product_name;
addUrl += "/" + product_cp;
addUrl += "/" + product_sp;
addUrl += "/" + product_des;
addUrl += "/" + product_exp;
addUrl += "/" + supplier;
addUrl += "/" + department;
addUrl += "/" + sub_department;
addUrl += "/" + vat;
$.ajax({type: 'GET', url: addUrl, data: {},
success: function (result) {
$.alert({
content: result
});
$("#product_code").val("");
$("#product_name").val("");
$("#product_cp").val("");
$("#product_sp").val("");
$("#product_des").val("");
$("#product_exp").val("");
$("#supplier").val("");
$("#department").val("");
$("#sub_department").val("");
$("#vat").val("");
location.reload();
},
error: function (xhr, status, error) {
$.alert({
content: 'Could not complete the process. ' + error
});
}
});
}
Here is the Controller Function:
private function addproduct($product_code = null, $product_name = null, $product_cp = null, $product_sp = null, $product_des = null, $product_exp = null, $supplier = null, $department = null, $sub_department = null, $vat = null) {
if (isset($product_code, $product_name, $product_cp, $product_sp, $product_des, $product_exp, $supplier, $department, $sub_department, $vat)) {
$email = $_SESSION[DbStrings::$EMAIL];
$product_code = $this->test_input($product_code);
$product_name = $this->test_input($product_name);
$product_cp = $this->test_input($product_cp);
$product_sp = $this->test_input($product_sp);
$product_des = $this->test_input($product_des);
$supplier = $this->test_input($supplier);
$department = $this->test_input($department);
$sub_department = $this->test_input($sub_department);
$vat = $this->test_input($vat);
$product_exp = strtotime($product_exp);
$insertedProduct = $this->member->insertProduct($email, $product_code, $product_name, $product_cp, $product_sp, $product_des, $supplier, $department, $sub_department, $vat, $product_exp);
if ($insertedProduct) {
echo "Your " . $_SESSION[AppStrings::$NOMENCLATURE] . " has been added succesfully";
} else {
echo "There was a problem inserting your " . $_SESSION[AppStrings::$NOMENCLATURE] . ". Please try again.";
}
} else {
echo 'Please fill all fields';
}
}
And this is the Model that does the insertion before sending back a result:
public function insertProduct($email, $product_code, $product_name, $product_cp, $product_sp, $product_des, $supplier, $department, $sub_department, $vat, $product_exp) {
$data = array(
DbStrings::$PRODUCTID => "",
DbStrings::$EMAIL => $email,
DbStrings::$PRODUCT_CODE => $product_code,
DbStrings::$PRODUCT_NAME => $product_name,
DbStrings::$PRODUCT_COST => $product_cp,
DbStrings::$PRODUCT_SELLING => $product_sp,
DbStrings::$PRODUCT_MARKUP => 9,
DbStrings::$PRODUCT_DESCRIPTION => $product_des,
DbStrings::$SUPPLIER => $supplier,
DbStrings::$DEPARTMENT => $department,
DbStrings::$SUB_DEPARTMENT => $sub_department,
DbStrings::$VAT => $vat,
DbStrings::$STOCK_BALANCE => 1,
DbStrings::$MIN_LEVEL => 1,
DbStrings::$MAX_QUANTITY => 1,
DbStrings::$QUANTITY_SOLD => 1,
DbStrings::$EXPIRY_DATE => $product_exp,
DbStrings::$DATE_CREATED => time(),
DbStrings::$DATE_STOCKED => time()
);
return $this->db->insert(DbStrings::$PRODUCTS_TABLE_NAME, $data);
}
I still get an error from the server, and don't know what else to do.
Correcting the above issue, the code works fine. I used: $this->output->enable_profiler(TRUE); and i was able to see the MySQL query sent by the model to the server, and when i copied the query and pasted it in my localhost:phpmyadmin, i got flagged for errors and there seem to be no syntax error.
Now this is creeping me out, as i can't fix it.