Question

我有一个看起来像这样的数据库：

  "trucks" : {
    "3705ec54-8a2e-4eb1-8bb9-ab2243645ac1" : {
      "email" : "sandwiches@123.com",
      "name" : "Sandwich Truck",
      "phone" : "123 - 456 - 1234",
      "provider" : "password",
      "selfDescription" : "We serve delicious sandwiches at a moderate price.  Cards Accepted.",
      "userType" : "truck",
      "website" : "www.sandwiches.com"
    },
    "54fea8cd-2203-46bd-aaf8-9d823e85313d" : {
      "email" : "pizza@123.com",
      "name" : "Supa Pizza",
      "phone" : "619 - 222 - 4444",
      "provider" : "password",
      "selfDescription" : "We serve incredible pizza at an incredibly unfair price.",
      "userType" : "truck",
      "website" : ""
    },
    "6c542367-507c-4d01-af2c-bf93a7efaef4" : {
      "email" : "fries@123.com",
      "name" : "Pete's Fries",
      "phone" : "11111111111111111111",
      "profilePhoto" : "",
      "provider" : "password",
      "selfDescription" : "We make some of the world's most delicious fries.",
      "userType" : "truck",
      "website" : ""
    },
    "7c6c4395-aec1-443c-908d-62db517def5e" : {
      "email" : "chili@123.com",
      "name" : "Mark's Chili",
      "phone" : "1-800-CHIL-LLL",
      "profilePhoto" : "",
      "provider" : "password",
      "selfDescription" : "We serve the most delicious chili, chili your mamma's mamma is scared to try.",
      "userType" : "truck",
      "website" : ""
    }
  }

我希望实现一个搜索栏，其中将返回名称与搜索字词匹配的卡车。例如，任何包含字符串＆＃39; fries＆＃39;将其ID提交给一组搜索结果ID。

这是我迄今为止尝试过的，但没有骰子。当我在搜索栏中键入薯条并点击搜索按钮时，它不会打印＆＃34; 6c542367-507c-4d01-af2c-bf93a7efaef4＆＃34;

let usersRef = Firebase(url: "https://•••••••••.firebaseIO.com/users")

usersRef.queryOrderedByChild("name").queryEqualToValue(searchBar.text).observeEventType(.ChildAdded, withBlock:{
    snapshot in

    print(snapshot.key)
})

我甚至不确定我有多接近，任何帮助都会受到大力赞赏。谢谢！

Answer 1

您正在使用queryEqualToValue（Query.equalTo()）进行查询，只有在完全匹配时才会返回结果。

详细说明：

在搜索栏中，如果我们正在进入＆＃34; fries＆＃34;它将寻找＆＃34; fries＆＃34;的完全匹配，这在我们的文档中是不可用的，因此是期望值＆＃34; 6c542367-507c-4d01-af2c-bf93a7efaef4＆＃34;没有打印。

相反，如果我们给出价值＆＃34; Pete＆＃39; s Fries＆＃34;在搜索栏中我们将得到结果＆＃34; 6c542367-507c-4d01-af2c-bf93a7efaef4＆＃34;

如果我们为搜索提供部分值，那么我们尝试实现类似于SQL中的LIKE Query的搜索。请参阅以下帖子以获取更多关于＆＃34;如何在firebase中执行LIKE查询的信息＆＃34;

How to perform sql "LIKE" operation on firebase?

查询Firebase中的特定字符串？

1 个答案: