refactor: export relations to json before imporing

saves time...

apis_ontology/management/commands/relations.py

@@ -0,0 +1,74 @@
+import json
+import requests
+import os
+import pathlib
+
+from django.core.management.base import BaseCommand
+
+SRC = "https://apis.acdh.oeaw.ac.at/apis/api"
+TOKEN = os.environ.get("TOKEN")
+HEADERS = {"Authorization": f"Token {TOKEN}"}
+RELATIONS = {}
+
+def import_relations():
+    relations = {
+            'personevent': {
+                "subj": "related_person",
+                "obj": "related_event",
+            },
+            'personinstitution': {
+                "subj": "related_person",
+                "obj": "related_institution"
+            },
+            "personperson": {
+                "subj": "related_personA",
+                "obj": "related_personB",
+            },
+            "personplace": {
+                "subj": "related_person",
+                "obj": "related_place",
+            },
+            "personwork": {
+                "subj": "related_person",
+                "obj": "related_work",
+            },
+            "placeplace": {
+                "subj": "related_placeA",
+                "obj": "related_placeB",
+            },
+    }
+    relationlist = {}
+    for relation, relationsettings in relations.items():
+        nextpage = f"{SRC}/relations/{relation}/?format=json&limit=1000"
+        while nextpage:
+            print(nextpage)
+            page = requests.get(nextpage, headers=HEADERS)
+            data = page.json()
+            nextpage = data["next"]
+            for result in data["results"]:
+                if result["relation_type"]:
+                    propdata = relationlist.get(result["relation_type"]["id"])
+                    if not propdata:
+                        proppage = requests.get(result["relation_type"]["url"])
+                        propdata = proppage.json()
+                        relationlist[result["relation_type"]["id"]] = propdata
+                    if result[relationsettings["subj"]] and result[relationsettings["obj"]]:
+                        RELATIONS[result["id"]] = {
+                            "name": propdata["name"],
+                            "name_reverse": propdata["name_reverse"] or propdata["name"] + " (reverse)",
+                            "subj": result[relationsettings["subj"]]["id"],
+                            "obj": result[relationsettings["obj"]]["id"],
+                        }
+                    else:
+                        print(result)
+                else:
+                    print(f"No relation type for relation {result}")
+
+
+class Command(BaseCommand):
+    help = "Import data from legacy APIS instance"
+
+    def handle(self, *args, **options):
+        import_relations()
+        rj = pathlib.Path("relations.json")
+        rj.write_text(json.dumps(RELATIONS, indent=2))