Task: Sync tasks data between Notion and Asana

n8n workflow JSON:
{"meta":{"instanceId":"237600ca44303ce91fa31ee72babcdc8493f55ee2c0e8aa2b78b3b4ce6f70bd9"},"nodes":[{"id":"daaa472a-fff3-41e2-9b6f-f7f54655ea16","name":"Determine create/update","type":"n8n-nodes-base.if","position":[1380,300],"parameters":{"conditions":{"string":[{"value1":"={{ $json[\"action\"] }}","value2":"Create"}]}},"typeVersion":1},{"id":"1b047238-80b4-4144-929d-f860510b68c6","name":"Update task","type":"n8n-nodes-base.notion","position":[1580,420],"parameters":{"pageId":"={{ $json[\"database_id\"] }}","resource":"databasePage","operation":"update","propertiesUi":{"propertyValues":[{"key":"Task|title","title":"={{ $json[\"name\"] }}"},{"key":"Deadline|date","date":"={{ $json[\"due_on\"] }}"}]}},"credentials":{"notionApi":{"id":"9","name":"[UPDATE ME]"}},"typeVersion":2},{"id":"71801502-14bd-42d2-beb9-e44e90bcac49","name":"Create task","type":"n8n-nodes-base.notion","position":[1580,180],"parameters":{"title":"={{$json[\"name\"]}}","resource":"databasePage","databaseId":"6181df20-c949-42e3-9999-7168d746efab","propertiesUi":{"propertyValues":[{"key":"Asana GID|number","numberValue":"={{ parseInt($json[\"gid\"]) }}"}]}},"credentials":{"notionApi":{"id":"9","name":"[UPDATE ME]"}},"executeOnce":true,"typeVersion":2},{"id":"76d95145-89ff-477f-9e28-a64c3601b4ea","name":"Get tasks","type":"n8n-nodes-base.asana","position":[780,300],"parameters":{"id":"={{ $json[\"gid\"] }}","operation":"get"},"credentials":{"asanaApi":{"id":"8","name":"[UPDATE ME]"}},"typeVersion":1,"continueOnFail":true},{"id":"b79c96eb-ad00-4aa7-b02e-306a940396fc","name":"Find tasks","type":"n8n-nodes-base.notion","position":[980,160],"parameters":{"options":{},"resource":"databasePage","operation":"getAll","databaseId":"6181df20-c949-42e3-9999-7168d746efab","filterJson":"={{$node[\"Get unique tasks\"].json[\"notionfilter\"]}}","filterType":"json"},"credentials":{"notionApi":{"id":"9","name":"[UPDATE ME]"}},"typeVersion":2},{"id":"9804b81f-b2f9-45dc-9bbd-a652543668fd","name":"Get unique tasks","type":"n8n-nodes-base.function","position":[580,300],"parameters":{"functionCode":"const gids = [];\n\n// get all the unique Asana task gids\nfor (item of items) {\n  var gid = parseInt(item.json.resource.gid);\n  var resource_type = item.json.resource.resource_type;\n  if (!(gids.includes(gid)) && resource_type == \"task\") {\n    gids.push(gid);\n  }\n}\n\n// show in output\nconst new_items = [];\nfor (gid of gids) {\n  var new_item = {\n    \"json\": {\n      \"gid\": 0,\n      \"gids\": [],\n      \"notionfilter\": \"\"\n    }\n  };\n  new_item = JSON.stringify(new_item);\n  new_item = JSON.parse(new_item);\n  new_item.json.gid = gid;\n  new_item.json.gids = gids;\n  new_items.push(new_item);\n\n  // Notion filter\n  notionfilter = {\n    or: [],\n  }\n\n  for (gid of gids) {\n    const filter = {\n      property: 'Asana GID',\n      number: {\n        equals: gid\n      }\n    }\n    notionfilter[\"or\"].push(filter);\n  }\n\n\n  new_item.json.notionfilter = JSON.stringify(notionfilter); \n}\n\nconsole.log(gids);\nreturn new_items;"},"executeOnce":false,"typeVersion":1},{"id":"91883ca1-91f8-41ce-84d5-00f9f3296cc7","name":"Determine","type":"n8n-nodes-base.function","position":[1180,300],"parameters":{"functionCode":"const gids_to_update = [];\nconst database_ids = [];\n\nfor (item of $items(\"Find tasks\")) {\n  gids_to_update.push(parseInt(item.json.property_asana_gid));\n  database_ids.push(item.json.id);\n}\nconsole.log(gids_to_update);\nconsole.log(database_ids);\n\nvar gid;\nlet i = 0;\nfor (item of $items(\"Get tasks\")) {\n  gid = parseInt(item.json.gid);\n  if (gids_to_update.includes(gid)) {\n    item.json.action = \"Update\"\n    item.json.database_id = database_ids[i];\n  } else {\n    item.json.action = \"Create\"\n  }\n  i++;\n}\n\nreturn $items(\"Get tasks\");"},"typeVersion":1},{"id":"8ba512bb-671a-47d2-88fc-19ed358df728","name":"Check required fields exist","type":"n8n-nodes-base.if","position":[1780,180],"parameters":{"conditions":{"string":[{"value1":"={{ $node[\"Determine\"].json[\"due_on\"] }}","operation":"isNotEmpty"}]}},"typeVersion":1},{"id":"512a09e0-c595-4613-a4d9-ed3160fd403b","name":"Update deadline","type":"n8n-nodes-base.notion","position":[1980,180],"parameters":{"pageId":"={{ $json[\"id\"] }}","resource":"databasePage","operation":"update","propertiesUi":{"propertyValues":[{"key":"Deadline|date","date":"={{ $node[\"Determine\"].json[\"due_on\"] }}"}]}},"credentials":{"notionApi":{"id":"9","name":"[UPDATE ME]"}},"typeVersion":2},{"id":"4b08a930-93ef-4f88-8109-9afa45af703e","name":"On update","type":"n8n-nodes-base.asanaTrigger","position":[380,300],"webhookId":"61055fe2-63c7-4b93-adcb-ddb7556c3060","parameters":{"resource":"1202718722261680","workspace":"1177253494675264"},"credentials":{"asanaApi":{"id":"8","name":"[UPDATE ME]"}},"typeVersion":1}],"connections":{"Determine":{"main":[[{"node":"Determine create/update","type":"main","index":0}]]},"Get tasks":{"main":[[{"node":"Find tasks","type":"main","index":0},{"node":"Determine","type":"main","index":0}]]},"On update":{"main":[[{"node":"Get unique tasks","type":"main","index":0}]]},"Find tasks":{"main":[[{"node":"Determine","type":"main","index":0}]]},"Create task":{"main":[[{"node":"Check required fields exist","type":"main","index":0}]]},"Get unique tasks":{"main":[[{"node":"Get tasks","type":"main","index":0}]]},"Determine create/update":{"main":[[{"node":"Create task","type":"main","index":0}],[{"node":"Update task","type":"main","index":0}]]},"Check required fields exist":{"main":[[{"node":"Update deadline","type":"main","index":0}]]}}}