SAP CAP project with persistent database: Error - missing localized_* tables

[iashishsingh]

Hello,

I am trying to run the sample bookshop app provided in the SAP CAP samples(https://github.com/SAP-samples/cloud-cap-samples). It runs as expected when using the default in-memory sqlite database (which is the default setting). If I try to change the settings to use a persistent sqlite database, the services are throwing errors of form:

SQLITE_ERROR: no such table: localized_<service-name>_<entitiy-name>

http://localhost:4004/browse/Books


<error xmlns="http://docs.oasis-open.org/odata/ns/metadata">
<code>500</code>
<message>SQLITE_ERROR: no such table: localized_CatalogService_Books</message>
</error>

Following is a step by step detail of what I've done. Any insight into what might be going wrong and how to fix it would be very much appreciated. Thanks!

Clone sample apps from https://github.com/SAP-samples/cloud-cap-samples

cd cloud-cap-samples/
npm i
npm run bookshop

The default configuration runs the sqlite database in-memory. In order to use the persistent database, do following changes:

cd packages/bookshop
cds deploy --to sqlite:my.db

The cds deploy command will create a persistent database and fill the necessary tables using sample CSV data files. It also updates the package.json with cds configuration to use a persistent database instead of the default in-memory database. You should see console messages like following:

> filling sap.capire.bookshop.Authors from db/data/sap.capire.bookshop-Authors.csv
 > filling sap.capire.bookshop.Books from db/data/sap.capire.bookshop-Books.csv
 > filling sap.capire.bookshop.Books_texts from db/data/sap.capire.bookshop-Books_texts.csv
 > filling sap.capire.bookshop.OrderItems from db/data/sap.capire.bookshop-OrderItems.csv
 > filling sap.capire.bookshop.Orders from db/data/sap.capire.bookshop-Orders.csv
 > filling sap.common.Currencies from db/data/sap.common-Currencies.csv
 > filling sap.common.Currencies_texts from db/data/sap.common-Currencies_texts.csv
/> successfully deployed to ./my.db
 > updated ./package.json

The package.json should have an updated "cds" section as follows -

"cds": {
    "requires": {
      "db": {
        "kind": "sqlite",
        "model": "db/schema.cds",
        "credentials": {
          "database": "my.db"
        }
      }
    }
  }

Now, if we trigger command 'cds run', the cds should start serving using the persistent database.

cds run

[cds] - connect to datasource - sqlite:my.db
[cds] - serving AdminService at /admin
[cds] - serving CatalogService at /browse - with impl: srv/cat-service.js
[cds] - service definitions loaded from:


  app/index.cds
  srv/admin-service.cds
  srv/cat-service.cds
  app/admin/fiori-service.cds
  app/browse/fiori-service.cds
  app/orders/fiori-service.cds
  app/common.cds
  db/schema.cds
  ../../node_modules/@sap/cds/common.cds


[cds] - launched in: 1303.835ms
[cds] - server listening on http://localhost:4004

Now, if you go to link http://localhost:4004/browse/Books, it shows following error:

<error xmlns="http://docs.oasis-open.org/odata/ns/metadata">
<code>500</code>
<message>SQLITE_ERROR: no such table: localized_CatalogService_Books</message>
</error>

[qmacro]

Great question, well formed and lots of detail. Nice work!

[iashishsingh]

Hi dj.adams.sap and thanks! Have learned a lot from your live recordings which I discovered very recently on Youtube. Can't appreciate you enough for the efforts you have been making!

[NicolasSchwarz]

Hey, I faced the same problem with the localized-error. Did you find a solving?

[MattRook]

Hi I know this is an old post but I am currently doing this same training project and I have the same issue. I'm surprised there isn't a more definitive solution 4 years later but I got it to work. I have had this problem before on other frameworks and the problem lies in the package-lock.json file. Delete that file, do an 'npm install' and redeploy with 'cds deploy'. That should refresh the package-lock file and update all the settings and work.

[david_kunz2]

Dear Ashish,

Thanks for reporting this issue, it seems like a bug!
Which version of `@sap/cds` are you using? You can find this information by typing `cds -v`.

I tested it with `@sap/cds: 3.21.3` and it works fine.

Thanks and best regards,
David

[iashishsingh]

Hi David,

Thanks for your quick reply!

My machine also has the same 3.21.3 version. Here is the output of `cds -v`:

@sap/cds-dk: 1.4.4
@sap/cds: 3.21.3
@sap/cds-compiler: 1.21.1
@sap/cds-foss: 1.1.0
@sap/cds-messaging: 1.5.0
@sap/cds-reflect: 2.9.2
@sap/cds-rest: 1.3.0
@sap/cds-services: 1.22.0
@sap/generator-cds: 2.11.1
Node.js: v10.16.0<br>

The bookshop/package.json has "@sap/cds": "latest" under "dependencies".

Sorry, I did not clearly understand you. Is it a bug in cds or does it look like a setup issue at my end?

Thanks David!

[iashishsingh]

Some additional information:

If I deploy the same app to SAP HANA cloud using the guide: https://cap.cloud.sap/docs/advanced/deploy-to-cloud, the service works fine as expected. The issue appears to be occurring when using the persistent database as sqlite.