codeigniter invalid argument supplied for foreach() on join clause - codeigniter

Question

i try all of away that i know and suggestion on internet.
but all time return false.
please help me...
thanks
my error message is:
Severity: Warning
Message: Invalid argument supplied for foreach()
Filename: views/index.php
Line Number: 10
model.php
public function getBanner()
{
$this->db->select('album.id, album.cat_id , album.poster, album.slug, album.modify, category.id, category.name, category.slug');
$this->db->from('album,category');
$this->db->where('album.cat_id', 'category.id');
$query = $this->db->get();
if($query->num_rows() != 0)
{
$result = $query->result_array();
return $result;
}
else
{
return false;
}
}
controllers.php
$data['banner'] = $this->Fornt_model->getBanner();
showbanner.php
<section class="banner">
<div class="container">
<div class="row">
<div class="col-sm-12">
<div id="myCarousel" class="carousel slide" data-ride="carousel">
<!-- Wrapper for slides -->
<div class="carousel-inner" role="listbox">
<?php $item = 1; foreach($banner as $latest_poster): $item_class = ($item == 1) ? 'item active' : 'item'; ?>
<div class="<?php echo $item_class; ?>">
<img src="<?php echo base_url('images/poster/'.$latest_poster['poster']); ?>" class="img-responsive img-thumbnail">
<div class="carousel-caption caption">
<a href="<?php echo site_url('category/bollywood/'.$latest_poster['slug']); ?>" class="box">
<b class="h3"><?php echo $latest_poster['name']; ?></b>
<small class="p">Exclusive AT*<?php echo substr($latest_poster['modify'], 0, 10); ?></small>
</a>
</div>
</div>
<?php $item++; endforeach; ?>
</div>
</div>
</div>
</div>
<div class="clearfix" style="padding: 10px 0;"></div>
<div class="row hidden-xs">
<?php $itemto = 0; foreach($banner as $latest_poster): $item_class_active = ($itemto == 0) ? 'active' : ''; ?>
<div class="col-sm-2 pointer" data-target="#myCarousel" data-slide-to="<?php echo $itemto; ?>"><img src="<?php echo base_url('images/poster/'.$latest_poster['poster']); ?>" class="img-responsive img-thumbnail" /></div>
<?php $itemto++; endforeach; ?>
</div>
</div>

Answer 1

I think something wrong with your query.. try
if($query->num_rows() != 0)
{
$result = $query->result_array();
print_r($result);
}
make sure your array data is available..

Answer 2

If there is no rows, front_model->getBanner() will return the result as false. Due to this you are getting an error. Use following code
public function getBanner()
{
$this->db->select('album.id, album.cat_id , album.poster, album.slug, album.modify, category.id, category.name, category.slug');
$this->db->from('album,category');
$this->db->where('album.cat_id', 'category.id');
$query = $this->db->get();
return $query->result_array();
}