emberfire/config/rules.json

The officially supported Ember binding for Firebase

{
  "rules": {

    "comments": {
      "$comment": {
        ".read": true,
        ".write": "!data.exists()",
        ".validate": "newData.hasChildren(['user', 'body', 'published'])",
      }
    },

    "posts": {
      ".read": true,
      ".indexOn": "published",

      "$post": {
        ".read": true,
        ".write": true,
        ".validate": "newData.hasChildren(['user', 'body', 'published', 'title'])",
        "body": {
          ".validate": "newData.isString()"
        },
        "comments": {
          "$comment": {
            ".write": "!data.exists()",
            ".validate": "newData.isBoolean()"
          }
        },
        "published": {
          ".validate": "newData.isNumber()"
        },
        "title": {
          ".validate": "newData.isString()"
        },
        "user": {
          ".validate": "newData.isString()"
        },
        "$other": {
          ".validate": false
        }
      }
    },

    "users": {
      "$user": {
        ".read": true,
        ".write": "!data.exists()"
      }
    }

  }
}