{
  "$schema": "https://json-structure.org/schema/v1.json",
  "$id": "https://raw.githubusercontent.com/api-evangelist/adafruit-io/main/json-structure/adafruit-io-feed-structure.json",
  "title": "Adafruit IO Feed Structure",
  "description": "JSON Structure description of an Adafruit IO Feed resource.",
  "type": "object",
  "structure": {
    "properties": {
      "id": { "type": "integer", "scope": "system" },
      "key": { "type": "string", "scope": "system", "constraint": "URL-safe slug, derived from name when omitted." },
      "name": { "type": "string", "scope": "user", "required": true },
      "description": { "type": "string", "scope": "user" },
      "unit_type": { "type": "string", "scope": "user" },
      "unit_symbol": { "type": "string", "scope": "user" },
      "visibility": { "type": "enum", "values": ["public", "private"], "scope": "user" },
      "history": { "type": "boolean", "scope": "user" },
      "license": { "type": "string", "scope": "user" },
      "last_value": { "type": "string", "scope": "system" },
      "status": { "type": "enum", "values": ["active", "inactive"], "scope": "system" },
      "created_at": { "type": "datetime", "scope": "system" },
      "updated_at": { "type": "datetime", "scope": "system" }
    }
  },
  "relationships": [
    { "from": "feed", "to": "data", "type": "one-to-many", "via": "feed_id" },
    { "from": "feed", "to": "group", "type": "many-to-many", "via": "feed_group" },
    { "from": "feed", "to": "block", "type": "one-to-many", "via": "block_feeds" },
    { "from": "feed", "to": "permission", "type": "one-to-many", "via": "object_id where model = feed" }
  ]
}