samples/database-call.json

{
  "obj_type": 1,
  "obj_id": 0,
  "title": "Database Query With Error Handling",
  "description": "Demonstrates db_call node with hardware/software error routing",
  "status": "active",
  "params": [
    {
      "name": "user_id",
      "type": "number",
      "descr": "User ID to look up",
      "flags": ["required", "input"],
      "regex": "",
      "regex_error_text": ""
    }
  ],
  "ref_mask": true,
  "conv_type": "process",
  "scheme": {
    "nodes": [
      {
        "id": "dbca000000000000000000001",
        "obj_type": 1,
        "condition": {
          "logics": [
            {"type": "go", "to_node_id": "dbca000000000000000000002"}
          ],
          "semaphors": []
        },
        "title": "Start",
        "description": "",
        "x": 400, "y": -52,
        "extra": "{\"modeForm\":\"collapse\",\"icon\":\"\"}",
        "options": null
      },
      {
        "id": "dbca000000000000000000002",
        "obj_type": 0,
        "condition": {
          "logics": [
            {
              "type": "db_call",
              "instance_id": 227,
              "query": "SELECT id, name, email FROM \"public\".\"users\" WHERE id = {{user_id}} LIMIT 1",
              "err_node_id": "dbca000000000000000000003"
            },
            {"type": "go", "to_node_id": "dbca000000000000000000007"}
          ],
          "semaphors": [
            {
              "type": "time",
              "value": 120,
              "dimension": "sec",
              "to_node_id": "dbca000000000000000000003"
            }
          ]
        },
        "title": "Fetch User Profile",
        "description": "Queries users table by user_id. Returns name and email on success.",
        "x": 400, "y": 100,
        "extra": "{\"modeForm\":\"expand\",\"icon\":\"\"}",
        "options": null
      },
      {
        "id": "dbca000000000000000000003",
        "obj_type": 0,
        "condition": {
          "logics": [
            {
              "type": "go_if_const",
              "to_node_id": "dbca000000000000000000004",
              "conditions": [
                {
                  "param": "__conveyor_db_call_return_type_error__",
                  "const": "hardware",
                  "fun": "eq",
                  "cast": "string"
                }
              ]
            },
            {"type": "go", "to_node_id": "dbca000000000000000000006"}
          ],
          "semaphors": []
        },
        "title": "Check DB Error Type",
        "description": "Routes hardware errors (connection issues) to retry, software errors (SQL) to failure",
        "x": 700, "y": 100,
        "extra": "{\"modeForm\":\"expand\",\"icon\":\"\"}",
        "options": null
      },
      {
        "id": "dbca000000000000000000004",
        "obj_type": 0,
        "condition": {
          "logics": [],
          "semaphors": [
            {
              "type": "time",
              "value": 30,
              "dimension": "sec",
              "to_node_id": "dbca000000000000000000002"
            }
          ]
        },
        "title": "Wait 30s Before Retry",
        "description": "Waits 30 seconds after a database connection error before retrying the query",
        "x": 700, "y": 300,
        "extra": "{\"modeForm\":\"expand\",\"icon\":\"\"}",
        "options": null
      },
      {
        "id": "dbca000000000000000000006",
        "obj_type": 2,
        "condition": {
          "logics": [],
          "semaphors": []
        },
        "title": "Final",
        "description": "",
        "x": 1000, "y": 100,
        "extra": "{\"modeForm\":\"collapse\",\"icon\":\"error\"}",
        "options": null
      },
      {
        "id": "dbca000000000000000000007",
        "obj_type": 2,
        "condition": {
          "logics": [],
          "semaphors": []
        },
        "title": "Final",
        "description": "",
        "x": 400, "y": 300,
        "extra": "{\"modeForm\":\"collapse\",\"icon\":\"success\"}",
        "options": "{\"save_task\":true}"
      }
    ],
    "web_settings": [[], []]
  },
  "uuid": "database-call-example-000000000001"
}