add example script for metadata to column

Author: NicolasCARPi

examples/002-extra-field-to-column.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python
+
+###################################################################################################################
+# In this example script, we want to grab information from metadata and add it to the Resource as a proper column #
+###################################################################################################################
+
+from pprint import pprint
+import elabapi_python
+import json
+
+# use the locally defined client.py module to get the api_client object, fully configured and ready to be used to instantiate api objects
+from client import api_client
+
+# Start by creating our api object to interact with /items endpoint
+items_client = elabapi_python.ItemsApi(api_client)
+
+# In this example, this corresponds to "Chemicals". Adapt to your instance.
+RESOURCE_CATEGORY_ID = 5
+# this value is the same for all eLabFTW instances
+CURRENCY_EUROS = 4
+
+# we need to use _preload_content=False here so we can access the metadata properly
+response = items_client.read_items(cat=1, limit=9999, _preload_content=False)
+items = json.loads(response.data.decode('utf-8'))
+for item in items:
+    metadata = item.get('metadata', None)
+    # they are supposed to all have metadata
+    if metadata is None:
+        print(f"WARNING: Skipping item with id {item.get('id')} because no metadata is present")
+        continue
+    meta = json.loads(metadata)
+    extra_fields = meta.get('extra_fields', None)
+    if extra_fields is not None:
+        proc_pack_qty = extra_fields.get("Quantity", 1).get("value")
+        proc_price_notax = extra_fields.get("Price", 0.00).get("value")
+        proc_price_tax = float(proc_price_notax) * 1.2
+        # no patch the item with these values
+        print(f"INFO: Patching item wtih id {item.get('id')}")
+        items_client.patch_item(item.get('id'), body={"proc_pack_qty": proc_pack_qty, "proc_price_notax": proc_price_notax, "proc_price_tax": proc_price_tax, "proc_currency": CURRENCY_EUROS})