GoCqlTable 封装了 GoCql-driver 目的是简化 Go 语言操作 Cassandra 数据库。

示例代码：

// Generic initialization of gocql  c := gocql.NewCluster("127.0.0.1")  s, err := c.CreateSession()  if err != nil {      log.Fatalln("Unable to open up a session with the Cassandra database (err=" + err.Error() + ")")  }     // Tell gocqltable to use this session object as the default for new objects  gocqltable.SetDefaultSession(s)        // Now we're ready to create our first keyspace. We start by getting a keyspace object  keyspace := gocqltable.NewKeyspace("gocqltable_test")     // Now lets create that in the database using the simple strategy and durable writes (true)  err = keyspace.Create(map[string]interface{}{      "class": "SimpleStrategy",      "replication_factor": 1,  }, true)  if err != nil { // If something went wrong we print the error and quit.      log.Fatalln(err)  }        // Now that we have a very own keyspace to play with, lets create our first table.     // First we need a Row-object to base the table on. It will later be passed to the table wrapper  // to be used for returning row-objects as the answer to fetch requests.  type User struct{      Email string // Our primary key      Password string `password`     // Use Tags to rename fields      Active bool     `cql:"active"` // If there are multiple tags, use `cql:""` to specify what the table column will be      Created time.Time  }     // Let's define and instantiate a table object for our user table  userTable := struct{      recipes.CRUD    // If you looked at the base example first, notice we replaced this line with the recipe  }{      recipes.CRUD{ // Here we didn't replace, but rather wrapped the table object in our recipe, effectively adding more methods to the end API          keyspace.NewTable(              "users",            // The table name              []string{"email"},  // Row keys              nil,                // Range keys              User{},             // We pass an instance of the user struct that will be used as a type template during fetches.          ),      },  }     // Lets create this table in our cassandra database  err = userTable.Create()  if err != nil {      log.Fatalln(err)  }        // Now that we have a keyspace with a table in it: lets make a few rows! In the base example we had to write out the CQL manually, this time  // around, however, we can insert entire User objects.     // Lets instantiate a user object, set its values and insert it  user1 := User{      Email: "1@example.com",      Password: "123456",      Active: true,      Created: time.Now().UTC(),  }  err = userTable.Insert(user1)  if err != nil {      log.Fatalln(err)  }        // With our database filled up with users, lets query it and print out the results (containing all users in the database).  rowset, err := userTable.List()  for _, row := range rowset {      user := row.(*User) // Our row variable is a pointer to "interface{}", and here we type assert it to a pointer to "User"  }  if err != nil {      log.Fatalln(err)  }        // You can also fetch a single row, obviously  row, err := userTable.Get("1@example.com")  if err != nil {      log.Fatalln(err)  }  user := row.(*User)        // Lets update this user by changing his password  user.Password = "654321"  err = userTable.Update(user)  if err != nil {      log.Fatalln(err)  }        // Lets delete user 1@example.com  err = userTable.Delete(user)  if err != nil {      log.Fatalln(err)  }     // Lets clean up after ourselves by dropping the keyspace.  keyspace.Drop()

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