F schema export references

Summary

For https://gitlab.indiscale.com/caosdb/customers/dimr/management/-/issues/38 Extends !80 (merged) by treatment of references and list of references.

(List of) References are translated int (arrays of) "oneOf" properties: They include a subschema for the creation of new Records of the referenced types, and an enum with the existing Records. A special case are reference properties with the generic db.REFERENCE datatype. Since here, we can't create a new Record (since we don't know a type), only the enum with all Records and Files is used.

Focus

RecordType treatment has been refactored s.th. it can be used recursively to create subschemas. Apart from this and the generation of the enum values, the existing property treatment was already enough.

Test Environment

Unit and integration tests should be sufficient but feel free to test with your favorite RT from a live system, too.

Check List for the Author

Please, prepare your MR for a review. Be sure to write a summary and a focus and create gitlab comments for the reviewer. They should guide the reviewer through the changes, explain your changes and also point out open questions. For further good practices have a look at our review guidelines

• All automated tests pass
• Reference related issues
• Up-to-date CHANGELOG.md (or not necessary)
• Up-to-date JSON schema (or not necessary)
• Appropriate user and developer documentation (or not necessary)
  • How do I use the software? Assume "stupid" users.
  • How do I develop or debug the software? Assume novice developers.
• Annotations in code (Gitlab comments)
  • Intent of new code
  • Problems with old code
  • Why this implementation?

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
• Appropriate user and developer documentation (or not necessary)
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there specifications? Are they satisfied?

For further good practices have a look at our review guidelines.

integrationtests/test.sh

@@ -14,7 +14,7 @@ then
     fi
 fi
 OUT=/tmp/crawler.output
-ls 
+ls
 cat pycaosdb.ini
 python3 -c "import linkahead; print('LinkAhead Version:', linkahead.__version__)"
 rm -rf /tmp/caosdb_identifiable_cache.db
@@ -57,7 +57,7 @@ echo "./crawl.py -a $RUN_ID /"
 ./crawl.py -a $RUN_ID / | tee  "$OUT"
 set +e
 if grep "There where unauthorized changes" "$OUT"
-then 
+then
     echo "There still were unauthorized changes, which should not have happend!"
     echo "Test FAILED"
     exit 1
@@ -96,5 +96,8 @@ python3 -m pytest test_json_schema_datamodel_parser.py
 echo "Testing yaml datamodel parser"
 python3 -m pytest test_yaml_parser.py
 
+echo "Testing json-schema exporter"
+python3 -m pytest test_json_schema_exporter.py
+
 # Obsolete due to teardown in the above test.
 # echo "/n/n/n YOU NEED TO RESTART THE SERVER TO REDO TESTS!!!"