I am trying to display the list of products for a user, and to my surprise this does not display it on the page, though, it is inserted into the database, what could be wrong?
public function index()
{
$listProducts = Product::where('user_id', '=', Auth::user()->id)->orderBy('productname', 'desc');
return view('product.index')
->with('products', $listProducts);
}
Blade file:
#if(Auth::check())
#foreach($products as $product)
<TR><TD>{!! $product->companyname !!}</TD><TD>{!! $product->productname !!}</TR>
#endforeach
#endif
The problem is that you need to return the data in an array:
return view('product.index', ['products' => $listProducts]);
As well as changing this:
$listProducts = Product::where('user_id', '=', Auth::user()->id)->orderBy('productname', 'desc');
To this:
$listProducts = Product::where('user_id', '=', Auth::user()->id)->orderBy('productname', 'desc')->get();
Related
So I was working on a DropDown list and it works, but it has many duplicate emails, I just want to see distinct emails... So I tried doing .Distinct() in the model class, but that still gave me duplicates..
Model Class:
public string One_Manager_Email{ get; set; }
public List<Hello> getManagers()
{
var que = (from wr in db.View
select new Hello
{
O_Manager_Email= wr.One_Manager_Email
}).Distinct().ToList();
return que;
}
Controller Class: (This is probably where the problem is happening)
public ActionResult Index()
{
test = new Hello();
ViewBag.Managers = new SelectList(test.getManagers(), "", "O_Manager_Email");
return View(test.getStuff());
}
View Class:
<div>
#Html.DropDownList("Managers", ViewBag.Managers as SelectList)
</div>
Any help would be great, thank you!
You need to group your objects by the property you want them to be distinct by, and then select the first element of the grouping.
public List<Hello> getManagers()
{
var que = (from wr in db.View
select new Hello
{
O_Manager_Email= wr.One_Manager_Email
})
.GroupBy(g => g.O_Manager_Email) //group by property
.Select(g => g.First()) //take first element from every grouping
.ToList();
return que;
}
For some more details, you can see this post that has more details on grouping and distinct: LINQ's Distinct() on a particular property
Distinct won't work on objects like that, as objects are always distinct, but you can try using group by in your query, something along these lines:
var que = (from wr in db.View
group new {wr.One_Manager_Email}
by new {wr.One_Manager_Email} into grouped
select new Hello
{
O_Manager_Email= grouped.Key.One_Manager_Email
}).ToList();
return que;
If you just need email address, you can select just string instead of selecting Hello object. If you select Hello object and try to distinct you like that way, you obviously get duplicated items. Because every object is already unique.
I believe you have already answer. GroupBy might solve your problem. However unless you really need GroupBy, don't use GroupBy! It's really expensive operation.
In your case, you should use DistinctBy.
var distinctList = list.DistinctBy(x => x.Prop).ToList();
On your code:
var que = (from wr in db.View
select new Hello
{
O_Manager_Email = wr.One_Manager_Email
}).DistinctBy(x=>x.O_Manager_Email).ToList();
Oh, in terms of DistinctBy usage, you should import namespace of Microsoft.Ajax.Utilities.
using Microsoft.Ajax.Utilities;
I have two tables deal_outlet and vendors_outlet. I am trying to compare a list of outlet_id from deal_outlet table to vendor table but .contain method shows error has some invalid arguments. I really don't understand problem in this code.
public ActionResult Detail_of_deal(int id)
{
var d1 = db.deal_outlet.Where(x => x.outlet_id==id).ToList();
f_model.model4 = db.vendors_outlet.Where(x =>d1.Contains(x.outlet_id)).ToList();
var d = obj.detail_of_image(id,ref model);
return View(f_model);
}
Depending on the goal of the code you could try the following:
public ActionResult Detail_of_deal(int id)
{
var d1 = db.deal_outlet.Where(x => x.outlet_id==id).ToList();
f_model.model4 = db.vendors_outlet.AsEnumerable().Select(x => d1.Contains(x.outlet_id)).ToList();
var d = obj.detail_of_image(id,ref model);
return View(f_model);
}
That should make f_model.model4 a list of all the vendors_outlets that have a matching deal_outlet.id
The Linq Contains method returns true if the list contains the item passed in. You are asking to see if a list of deal_outlet objects contains an int, which obviously it won't.
Instead of projecting a collection of deal_outlets, project a list of integers:
var d1 = db.deal_outlet.Where(x => x.outlet_id==id).Select(x => x.outlet_id);
f_model.model4 = db.vendors_outlet.Where(x =>d1.Contains(x.outlet_id)).ToList();
But logically, that's the same as:
f_model.model4 = db.vendors_outlet.Where(x =>x.outlet_i==id)).ToList();
So it's not clear what you're trying to do.
EDIT
Based on your comments, I believe these are the queries you want:
i am trying to fetch list of outlet_id from deal_outlet table where deal_id equal to id,
var d1 = db.deal_outlet.Where(x => x.deal_id==id).ToList();
Now want to compare this list to vendor_outlet table and fetch those rows where outlet_id from deal_outlet table equals to outlet_id in vendor_outlet table
Get a list of ID's to match:
var ids = d1.Select(x => x.outlet_id).ToList();
And use Contains to see if the list contains any of the IDs from the related table:
f_model.model4 = db.vendors_outlet.Where(vo => ids.Contains(vo.outlet_id))
.ToList();
I have a database called news and have a column called description, I have two take the Last two entries from table (description column) and display the result as a single string string , ie, want to append the data in the Second last column to the last data. But I am not able to append the text,and deleted the code.
controller
public ActionResult Index()
{
var news = db.News.OrderByDescending(u => u.Id).FirstOrDefault();
return View(news);
}
view
#model Project.Models.News
<a href="#Url.Action("NewsInnerPage", "News")">
<marquee>
<p>
#Html.Raw(Model.Description)
</p>
</marquee>
</a>
sql column
I want to get the value from table last two entries as a single string . can anyone please help me to write the code . how can i append string ???
var news = db.News.OrderByDescending(u => u.Id).Take(2).ToList();
var concatenatedNews = new News {
Description = news[0].Description + news[1].Description
};
or you could do it all in one line
var news = new News { Description = string.Join("", news.OrderByDescending(u => u.Id).Take(2).Select(u => u.Description)) };
I feel like I must me missing something very simple. It's a very simple task, all I want to do is get something like:
SELECT * FROM lookup_items
JOIN lookup ON lookup_items.lookup_id = lookup.id
This returns all the columns for all the joined tables, in regular SQL. Here's my attempt in zf2:
$select = new Select();
$select->from('lookup_items');
$select->join('lookup', 'lookup_items.lookup_id = lookup.id');
The result set only includes the columns in 'lookup_items'. I've tried various ways to get the 'lookup' columns, including:
$select->columns(array('lookup_items.*', 'lookup.*'));
But they all just blow up. Surely there's a way to do this, and it's just so simple I'm missing it completely.
I thought a simple example would be avoid confusion, but here's more code:
class LookupItemsTable extends AbstractTableGateway
{
public function getList($resource)
{
$system_name = str_replace('*', '%', strtoupper($resource));
$joinTable = 'lookup';
$select = new Select();
$select->from($this->table);
$select->join($joinTable, "{$this->table}.lookup_id = {$joinTable}.id");
$where = array();
$where[] = "{$this->table}.enabled is true";
$where[] = "{$joinTable}.enabled is true";
$where[] = "UPPER({$joinTable}.system_name) ilike '{$system_name}'";
$select->where($where);
$sort[] = 'sort_order ASC';
$sort[] = 'value ASC';
$select->order($sort);
$rowset = $this->selectWith($select);
return $rowset;
}
}
Where:
$resource = $this->params()->fromRoute('resource', 'BUSINESS');
And $this->table is 'lookup_items'. Really all I want to do is get columns from both joined tables. I guess there's a zf2 way to just make a straight SQL statement without all the OO falderal, so I could just force it that way. But I'd rather work within the framework as much as possible.
Just change this line
$select->join('lookup', 'lookup_items.lookup_id = lookup.id');
to
$select->join('lookup', 'lookup_items.lookup_id = lookup.id', array('lookupcol1', 'lookupcol2');
Raj answer is the best one but it only works if you don't forget to add these fiels in your LookupItems model.
class LookupItems
{
// Your lookup_items fields here...
...
// And the added lookup fields here, the ones you add in the array
public $lookupcol1;
public $lookupcol2;
And in the exchangeArray method :
public function exchangeArray($data)
{
// .... your fields, and the new ones
$this->lookupcol1 = (! empty($data['lookupcol1'])) ? $data['lookupcol1'] : null;
$this->lookupcol2 = (! empty($data['lookupcol2'])) ? $data['lookupcol2'] : null;
}
I figured it out.
Added this:
$select->columns(array('*'));
And then this near the end:
$sql = new Sql($this->adapter);
$statement = $sql->prepareStatementForSqlObject($select);
$rowset = $statement->execute();
This returns the expected result, with the caveat that now my rows are returned as associative arrays instead of objects.
This is how you can create queries with join in zf2.
$resultSet = $this->select(function (Select $select) {
// omit the table name
//$select->from('foo');
$select->join('users', "users.id foo.createdby", 'firstname', '');
$select->order('id ASC');
// echo $select->getSqlString();// to print your query
});
$entities = array();
foreach ($resultSet as $row) {
$entity = new Entity\Foo();
$entity->setId($row->id)
->setFullname($row->fullname)
->setCaseid($row->caseid)
->setTestimonial($row->testimonial)
->setSortorder($row->sortorder)
->setActive($row->active)
->setCreated($row->created)
->setModified($row->modified)
->setFirstname($row->firstname)
->setCreatedby($row->createdby);
$entities[] = $entity;
}
return $entities;
I'm trying to write a search function that will search trough the whole table and I'll get all columns, so far I'm using this code and I can only extract one column from the table, how can I get all columns.
CODE:
public ActionResult SearchIndex(string productsAll, string searchString)
{
var products = from m in db.Products
select m;
if (!String.IsNullOrEmpty(searchString))
{
products = products.Where(n => n.Name.Contains(searchString));
}
if (string.IsNullOrEmpty(productsAll))
return View(products);
else
{
return View(products);
}
}
Please HELP :D
You can filter based upon other columns as well...
products = products.Where(n => n.Name.Contains(searchString) ||
n.Prop2.Contains(searchString) ||
n.Prop3.Contains(searchString));
Which will get you any record which contains that string in any of the fields you specified.