mORMot Open Source

youssef

Member

Registered: 2024-08-05

Posts: 6

TOrmTableDataSet3 being Read-Only after Loading Data via CreateFromJso

I’m facing a problem where TOrmTableDataSet3 is read-only, preventing me from modifying the dataset.

I'm loading the dataset using TOrmTableDataSet.CreateFromJson. Here's the code I’m using for appending data:

UniEdit1.onkeyPress
  with DataSource1.DataSet do
    begin
      Append;
      FieldByName('NewQty').AsString := 'AG-' + Format('%', [UniEdit1.Text]);
    end;

However, I keep getting the error => TOrmTableDataSet3: Cannot modify a read-only dataset.

tbo

Member

Registered: 2015-04-20

Posts: 353

Re: TOrmTableDataSet3 being Read-Only after Loading Data via CreateFromJso

However, I keep getting the error => TOrmTableDataSet3: Cannot modify a read-only dataset.

What is your question?

With best regards
Thomas

ab

Administrator

From: France

Registered: 2010-06-21

Posts: 14,649

Website

Re: TOrmTableDataSet3 being Read-Only after Loading Data via CreateFromJso

It is a read-only dataset by design.
It is a TDataSet which maps the JSON values.

If you want to modify the dataset content, you need a read/write dataset.
For instance, you can use https://github.com/synopse/mORMot2/blob … ui.cds.pas which uses a TClientDataSet for a read/write storage.