How to correctly form a Post request to the Redmine server?

Question

RESTful API

Good afternoon. I'm trying to figure out how to add tasks to Redmine, but I constantly get an error 422. Judging by the Redmine manuals, this means that the message format is not correct. But also in these manuals it is said that there should be an error text for a value that the server does not like, but it does not exist. I actually did everything according to the example (example: www.redmine.org/projects/redmine/wiki/Rest_api_wit... ), and then I started experimenting. I have not found any more examples of working with the HttpCli component on the net. Redmine version is 2.6.0.stable. I am using Delphi XE. If anyone has experience, please share. Links to resources are also welcome. PS The example for getting the task works.

Answer 1

Interesting, is it still relevant?
422 can also pop up if the transmitted data contains an action that is "forbidden" for the user or incorrect data - for example, an attempt to set the due date is less than the start date.
www.sql.ru/forum/1129863/redmine-rest-api?mid=1694...
here in this message the second example helped me a lot (I also have Delphi XE 4)
Working example (with additional fields)

address:='https://АДРЕС/projects/НАЗВАНИЕ ПРОЕКТА/issues.xml?key=';
                      apiAccessKey := edit1.text; ///Api user key example
                           for I := 0 to memo1.Lines.Count-1 do
                              begin
                                  date_due:=copy(memo5.Lines[i],7,4)+'-'+copy(memo5.Lines[i],4,2)+'-'+copy(memo5.Lines[i],1,2);
                                  date_close:=copy(memo6.Lines[i],7,4)+'-'+copy(memo6.Lines[i],4,2)+'-'+copy(memo6.Lines[i],1,2);
                                  date_check:=copy(memo7.Lines[i],7,4)+'-'+copy(memo7.Lines[i],4,2)+'-'+copy(memo7.Lines[i],1,2);
                                      try
                                         issue := TStringList.Create;
                                                with issue do
                                                    begin

                                                      Add('issue[tracker_id=44');
                                                      Add('issue[subject='+memo1.Lines[i]);
                                                      Add('issue[description='+memo2.Lines[i]);
                                                      Add('issue[status_id=1');
                                                      Add('issue[priority_id=2');
                                                      Add('issue[assigned_to_id='+memo3.Lines[i]);
                                                      Add('issue[start_date='+formatdatetime('YYYY-MM-dd',now()));
                                                      Add('issue[due_date='+date_due);
                                                      Add('issue[fixed_version_id='+memo8.Lines[i]);
                                                      Add('issue[custom_field_values[166='+memo4.Lines[i]);
                                                      Add('issue[custom_field_values[76='+memo3.Lines[i]);
                                                      Add('issue[custom_field_values[106='+date_close);
                                                      Add('issue[custom_field_values[66='+date_check);
                                                    end;
                                                   try
                                          idhttp1.Post(address+apiAccessKey,issue);
                                                    except
                                                    issue.Destroy;
                                                      raise;
                                          end;
                                          finally
                                          issue.Destroy;
                                          end;