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How to update object stored inside an SQLite DB


By : user2175360
Date : October 15 2020, 08:10 PM
I think the issue was by ths following , The problem with the Id of your product being not set when retrieved from the DB is that you set the Id property to as private set, which means SQLite cannot actually set the property value and hence it remains 0. Just remove private from the setter and everything should work fine :-) .
code :
public class Product
{
    [PrimaryKey AutoIncrement]
    public int Id { get; set; }
    ...
}
private Product _updatedProduct;

protected override void OnNavigatedTo(NavigationEventArgs e)
{
    int id = (int)e.Parameter;
    //assign to the private field
    _updatedProduct = data.GetProductById(id);

    nameTextBox.Text = _updatedProduct.ProductName;
    priceTextBox.Text = _updatedProduct.Price.ToString();
    quantityTextBox.Text = _updatedProduct.Quantity.ToString();
    descTextBox.Text = _updatedProduct.Description;
}

private async void saveButton_Click(object sender, RoutedEventArgs e)
{
    //update properties of the private field
    _updatedProduct.ProductName = nameTextBox.Text;
    _updatedProduct.Price = double.Parse(priceTextBox.Text);
    _updatedProduct.Quantity = int.Parse(quantityTextBox.Text);
    _updatedProduct.Description = descTextBox.Text;

    if (data.UpdateProduct(_updatedProduct))
    {
        MessageDialog md = new MessageDialog("Product changes updated", "UPDATE OUTCOME");
        await md.ShowAsync();
    }
    else
    {
        MessageDialog md = new MessageDialog("Product changes NOT updated", "UPDATE OUTCOME");
        await md.ShowAsync();
    }

    Frame.Navigate(typeof(MainPage));
}


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How to Update a Row Inside a While Loop In a Stored Procedure


By : sanku
Date : March 29 2020, 07:55 AM
Any of those help First off, you are not declaring variables, you're actually declaring parameters which you are using like variables.
Apart from @CommisionRateID, every one of the parameters will have any original value overwritten before the original value could be used.Unless you need to pass a value into the SP and use it, then you should remove it from the parameter list and declare it in the body of the proc.
code :
CREATE PROC spAssignCommissionRate
AS
BEGIN
    UPDATE CarDetails
    SET CommissionRateID = CASE WHEN (SalePrice * 100) / ListPrice > 50 THEN 3
                                 WHEN (SalePrice * 100) / ListPrice > 30 THEN 2 
                                 ELSE 1
                            END
    WHERE CommissionRateID IS NULL
END

Update reference to object stored inside vector in c++


By : Lebron29
Date : March 29 2020, 07:55 AM
around this issue I have a std::vector with objects of the class Actor
code :
Actor actor = get_actor_ref_from_ped(PLAYER::PLAYER_PED_ID());
Actor & actor = get_actor_ref_from_ped(PLAYER::PLAYER_PED_ID());
      ^^^^^^^ reference variable

SQLite select inside of update


By : Brijmohan Sharma
Date : March 29 2020, 07:55 AM
I wish this help you To use the same table name multiple times, rename one of them. This is not possible with UPDATE, so you have to do this in the SELECT. To look up the corresponding timestamp, use another subquery. Together with some simplifications, this becomes:
code :
UPDATE Transaction_associations
SET remaining_balance =
(
    SELECT SUM(TA2.amount) 
    FROM Transactions 
    JOIN Transaction_associations AS TA2 ON Transactions.id = TA2.transaction_id
    WHERE created_at <= (SELECT created_at
                         FROM Transactions
                         WHERE id = Transaction_associations.transaction_id)
) 
WHERE transaction_id IN
(
    SELECT id
    FROM Transactions
    WHERE created_at >= '2014-11-24'
);

SQL stored procedure to get a user object and then update the values of that object


By : Ravinder Singh
Date : March 29 2020, 07:55 AM
it fixes the issue I am looking to make a single SQL statement to select an object from the database and then update that object based on values entered through a form. , You may need this, try it.
code :
update dbo.people u
inner join dbo.people as pe on pe.people_id = u.people_id
inner join dbo.parties as pa on pa.people_id = pe.people_id
inner join dbo.contact_details as cd on cd.parties_id = pa.parties_id
inner join `enum`.contact_details_types cdt on cdt.contact_details_types_id = cd.contact_details_types_id
on u.people_id = 57121526-03e3-4dc2-bfb8-6c6fc84a9de8'
set
    u.sexes_id = ?,
    u.marital_states_id = ?,
    u.employment_states_id = ?,
    u.linkedins_id = ?,
    u.facebooks_id = ?,
    u.first_names = ?,
    u.surnames = ?,
    u.name_to_call_user = ?,
    u.id_number = ?,
    u.passport_number = ?,
    u.birth_date = ?,
    u.tax_number = ?,
    u.vat_number = ?,
    u.message_to_show_on_user_invoice = ?,
    u.workplace_name = ?;

How to read/update values stored inside a map which is then inside of an array in Cloud Firestore?


By : user2650387
Date : March 29 2020, 07:55 AM
will be helpful for those in need If you intend to get a List or a List when querying your Cloud Firestore database, please note that this is currently not possible. Even if those objects are of type Semester and Student, there is no way you can map them into a List of Semester/Student objects. To solve this, you need to write code to iterate those objects so you can convert them from a List to a Listand List. So you need to apply your own logic for that.
Edit:
code :
document.getData();
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