[fpc-pascal] fpreport: can not use two ObjectLists as datasource in one report

[Andreas Frieß]

Am 18.03.2021 um 16:06 schrieb Andreas Frieß via fpc-pascal:
> Am 18.03.2021 um 14:24 schrieb Michael Van Canneyt via fpc-pascal:
>>
>> In that case, you must put lReportOLData2 on a separate design page.
>>
>> So:
>> * Add a design page (page 1) to the report.
>> * Do what you need with lReportOLData1 on this page.
>> * Add a second design page (page 2) to the report
>> * Do what you need with lReportOLData2 on this page.
>>
>>
>> That should be it.
>>
>> Michael.
>
> It is a joke, every ReportData need a new page.
>
>
The issue is, fpreport handle the Databand not correct.

All have no Masterband set

A ) If i bound no Data to a Databand, automatic the dataset of the
parent (Page) is used  -> Ok yet -> Dataloop of parent is used

B ) If i bound Data to a Databand and it is the same like the parent
(page) -> Ok -> Dataloop of parent is used

C ) If i bound Data to a Databand and it is not the same like the parent
-> Not Ok  -> the first it is handled like B  - it should use their own
dataloop

You can make this with a fake working. Make a dummy Databand with a
Dataset with ONE entry only. Then bound the datasets as childdatasets
and it works.


You see the problem with the FPReport Designer too.

- Make a new report

- add two datasets (eg, csv with valid data)

- add PageheaderBand, TitleBand and PageFooterband

- add a Databand bound the Data1 to it

- add a Databand bound the Data2 to it

Make a Report Preview -> only the contend of the first dataset is shown.


I will file a bug

Andreas