Metadata not showing in results

plazma · Yesterday, 10:46 PM

Hi, I'm working on Metadata (Source) plugin, and the source I'm using does not list ISBNs for every book.

Now, what happens is, that when I don't have the ISBN, I don't call the `self.plugin.cache_isbn_to_identifier` method. And if I don't do that, then the result is not listed, even if I add it to the result_queue.

When I create some dummy ISBN and call the cache method, then I see the result. But then the ISBN can be overwritten (if it already exists). Or, if I create an isbn that is bad (e.g. contains characters), then after the data is accepted, it shows that the ISBN is wrong (because that identifier uses special checks).

So, my question is, if the source for the book's metadata does not have the ISBN listed, what is the correct way to handle this, if I want it to be listed in the results? I couldn't find any documentation around this.

kovidgoyal · Yesterday, 10:56 PM

There is no requirement at all that results have isbns. You likely have some other issue.

plazma · Yesterday, 11:13 PM

What other issues can be there?

And why the result shows up when I add the ISBN and does not show up when it is not there?

Any way how can I debug why the result does not show up?

plazma · Yesterday, 11:23 PM

This is a screenshot from the results and the debug console. It founds 4 results, but only 3 are shown. The one missing isbn is not shown. When I generate a dummy isbn, it will show up. The only difference is, that I set the mi.isbn and call the cache_isbn_to_identifier method. Even if I call the cache_isbn_to_identifier, if the mi.isbn is not set, it will not show up.

https://pasteboard.co/iwmtkHP8tOqU.png

At the end, it says this:

```
************************************************** ******************************
The identify phase took 9.04 seconds
The longest time (8.853095) was taken by: Martinus.sk
Merging results from different sources
We have 3 merged results, merging took: 0.00 seconds
```

So it somehow merged the results? But why?

kovidgoyal · Yesterday, 11:34 PM

The final list of results is *merged*. When you specify a rando isbn you prevent that merge from happening. Turn on the option to keep more than one netry per source to reduce merging.

plazma · Yesterday, 11:37 PM

Found it, there is

```
prefer_results_with_isbn = False
```
Which can be set in the plugin.... oh man.

https://manual.calibre-ebook.com/plu...ults_with_isbn

Yesterday, 10:46 PM	#1
plazma Member Posts: 20 Karma: 10 Join Date: Feb 2014 Device: kindle paperwhite	[SOLVED] Metadata not showing in results Hi, I'm working on Metadata (Source) plugin, and the source I'm using does not list ISBNs for every book. Now, what happens is, that when I don't have the ISBN, I don't call the `self.plugin.cache_isbn_to_identifier` method. And if I don't do that, then the result is not listed, even if I add it to the result_queue. When I create some dummy ISBN and call the cache method, then I see the result. But then the ISBN can be overwritten (if it already exists). Or, if I create an isbn that is bad (e.g. contains characters), then after the data is accepted, it shows that the ISBN is wrong (because that identifier uses special checks). So, my question is, if the source for the book's metadata does not have the ISBN listed, what is the correct way to handle this, if I want it to be listed in the results? I couldn't find any documentation around this. Last edited by plazma; Yesterday at 11:49 PM.

Yesterday, 11:23 PM	#4
plazma Member Posts: 20 Karma: 10 Join Date: Feb 2014 Device: kindle paperwhite	This is a screenshot from the results and the debug console. It founds 4 results, but only 3 are shown. The one missing isbn is not shown. When I generate a dummy isbn, it will show up. The only difference is, that I set the mi.isbn and call the cache_isbn_to_identifier method. Even if I call the cache_isbn_to_identifier, if the mi.isbn is not set, it will not show up. https://pasteboard.co/iwmtkHP8tOqU.png At the end, it says this: ``` ************************************************ **************************** The identify phase took 9.04 seconds The longest time (8.853095) was taken by: Martinus.sk Merging results from different sources We have 3 merged results, merging took: 0.00 seconds ``` So it somehow merged the results? But why? Last edited by plazma; Yesterday at 11:37 PM.

Yesterday, 11:37 PM	#6
plazma Member Posts: 20 Karma: 10 Join Date: Feb 2014 Device: kindle paperwhite	Found it, there is ``` prefer_results_with_isbn = False ``` Which can be set in the plugin.... oh man. https://manual.calibre-ebook.com/plu...ults_with_isbn Last edited by plazma; Yesterday at 11:41 PM.

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Yesterday, 10:56 PM	#2
kovidgoyal creator of calibre Posts: 45,514 Karma: 28548962 Join Date: Oct 2006 Location: Mumbai, India Device: Various	There is no requirement at all that results have isbns. You likely have some other issue.

Yesterday, 11:13 PM	#3
plazma Member Posts: 20 Karma: 10 Join Date: Feb 2014 Device: kindle paperwhite	What other issues can be there? And why the result shows up when I add the ISBN and does not show up when it is not there? Any way how can I debug why the result does not show up?

Yesterday, 11:34 PM	#5
kovidgoyal creator of calibre Posts: 45,514 Karma: 28548962 Join Date: Oct 2006 Location: Mumbai, India Device: Various	The final list of results is merged. When you specify a rando isbn you prevent that merge from happening. Turn on the option to keep more than one netry per source to reduce merging.

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