我有一个方法可以将值插入外部数据库。我有一系列团队成员名称，这些成员名称循环并逐个发送到数据库以及团队成员团队ID（这是team_members表中的外键）。
以下是我简单的数据库设计：
CREATE TABLE team (
team_id int(11) NOT NULL AUTO_INCREMENT,
unique_id varchar(23) NOT NULL,
teamName varchar(50) NOT NULL,
PRIMARY KEY (team_id)
);
CREATE TABLE team_member (
team_member_id int(11) NOT NULL AUTO_INCREMENT,
unique_id varchar(23) NOT NULL,
fullName varchar(50) NOT NULL,
team_id int (11) NOT NULL,
PRIMARY KEY (team_member_id),
FOREIGN KEY (`team_id`)
REFERENCES `scratchcard`.`team` (`team_id`)
);
以下是我用来实现此目的的方法：
private void addTeamMember(final List teamMemberArray,final String team_id) {
//helps with debugging regarding post requests
Gson gson = new GsonBuilder()
.setLenient()
.create();
//Retrofit is a REST Client for Android and Java by Square.
//It makes it relatively easy to retrieve and upload JSON (or other structured data) via a REST based webservice
Retrofit retrofit = new Retrofit.Builder()
//directing to the localhost which is defined in the Constants Class as BASE_URL
.baseUrl(Constants.BASE_URL)
//Add converter factory for serialization and deserialization of objects.
//Gson passed as a parameter to help with debug
.addConverterFactory(GsonConverterFactory.create(gson))
//Create the Retrofit instance using the configured values.
.build();
//The Retrofit class generates an implementation of the RequestInterface interface.
RequestInterface requestInterface = retrofit.create(RequestInterface.class);
for (Object x : teamMemberArray) {
//create new Team object
TeamMember teamMember = new TeamMember();
//setter
teamMember.setFullName(String.valueOf(x));
teamMember.setTeam_id(team_id);
Toast.makeText(getActivity(), teamMember.getFullName(),
Toast.LENGTH_LONG).show();
//create new server object
final ServerRequest request = new ServerRequest();
//make a request to set the operation to Team_Member
request.setOperation(Constants.Team_Member);
//set values entered for the new teamMember to be sent to the server
request.setTeamMember(teamMember);
Call<ServerResponse> response = requestInterface.operation(request);
/**
* Enqueue is used to Asynchronously send the request and notify callback of its response or if an error occurred
* talking to the server, creating the request, or processing the response.
*/
response.enqueue(new Callback<ServerResponse>() {
@Override
public void onResponse(Call<ServerResponse> call, retrofit2.Response<ServerResponse> response) {
ServerResponse resp = response.body();
/*Snackbars provide lightweight feedback about an operation. They show a brief message at the
bottom of the screen on mobile and lower left on larger devices. Snackbars appear above all other
elements on screen and only one can be displayed at a time.
*/
Snackbar.make(getView(), resp.getMessage(), Snackbar.LENGTH_LONG).show();
if (resp.getResult().equals(Constants.SUCCESS)) {
SharedPreferences.Editor editor = pref.edit();
Log.d("TEST VALUE", "getTeamMemberName() = " + response.body().getTeamMember().getFullName() );
Log.d("TEST VALUE", "getTeamMemberUniqueID() = " + response.body().getTeamMember().getUnique_id());
Log.d("TEST VALUE", "getTeamMemberTeamID() = " + response.body().getTeamMember().getTeamID());
editor.putString(Constants.FULL_NAME, resp.getTeamMember().getFullName());
editor.putString(Constants.UNIQUE_ID, resp.getTeamMember().getUnique_id());
editor.putString(Constants.TEAM_ID, resp.getTeamMember().getTeamID());
editor.apply();
goToQuestions();
}
progress.setVisibility(View.INVISIBLE);
}
@Override
public void onFailure(Call<ServerResponse> call, Throwable t) {
progress.setVisibility(View.INVISIBLE);
Log.d(Constants.TAG, "failed" + t);
Snackbar.make(getView(), t.getLocalizedMessage(), Snackbar.LENGTH_LONG).show();
}
});
}
}
因为我一次插入一个这样的值，所以我有以下简单的插入脚本（使用PDO）
public function insertTeamMember($fullName, $team_id){
$unique_id = uniqid('', true);
$sql = 'INSERT INTO team_member SET unique_id =:unique_id,fullName =:fullName, team_id =:team_id';
$query = $this ->conn ->prepare($sql);
$query->execute(array('unique_id' => $unique_id, ':fullName' => $fullName, ':team_id' => $team_id));
$data = $query -> fetchObject();
if ($query) {
$teamMember["fullName"] = $fullName;
$teamMember["unique_id"] = $unique_id;
$teamMember["team_id"] = $team_id;
return $teamMember;
} else {
return false;
}
}
我的日志输出使用response.body确认值正在接近我的插入脚本。
08-11 11:07:49.750 3884-3884/com.test.practise D/TEST VALUE: getTeamMemberName() = 1
08-11 11:07:49.750 3884-3884/com.test.practise D/TEST VALUE: getTeamMemberUniqueID() = 598d90061b7de5.56364485
08-11 11:07:49.750 3884-3884/com.test.practise D/TEST VALUE: getTeamMemberTeamID() = 598d8ffd0b9969.94188022
08-11 11:07:49.754 3884-3884/com.test.practise D/TEST VALUE: getTeamMemberName() = 2
08-11 11:07:49.754 3884-3884/com.test.practise D/TEST VALUE: getTeamMemberUniqueID() = 598d90061d4347.93277262
08-11 11:07:49.754 3884-3884/com.test.practise D/TEST VALUE: getTeamMemberTeamID() = 598d8ffd0b9969.94188022
08-11 11:07:49.759 3884-3884/com.test.practise D/TEST VALUE: getTeamMemberName() = 3
08-11 11:07:49.759 3884-3884/com.test.practise D/TEST VALUE: getTeamMemberUniqueID() = 598d90061d8bb2.78397401
08-11 11:07:49.759 3884-3884/com.test.practise D/TEST VALUE: getTeamMemberTeamID() = 598d8ffd0b9969.94188022
我的回调确认成功插入数据（我正在使用MYSQL），如我的日志输出所示，但数据实际上并没有插入我的数据库。
我认为我的插入脚本一定存在问题，但我不确定解决方案是什么。我曾尝试使用Postman来帮助我，但这再一次并没有指明我为什么被告知成功，而是实际上没有让我的数据插入。
答案 0 :(得分：1)
您的插入查询错误。它应该看起来像
$sql = 'INSERT INTO team_member (`unique_id`, `fullName`, `team_id`) VALUES (:unique_id, :fullName, :team_id)';
删除以下行。它用于＆＃34; SELECT＆＃34;获取记录。你运行插入查询。
$data = $query -> fetchObject();
在同一位置添加以下行并获取最后一个插入ID。
$insert_id = $this ->conn->lastInsertId();//find last inserted id.
if($insert_id > 0){
$teamMember["fullName"] = $fullName;
$teamMember["unique_id"] = $unique_id;
$teamMember["team_id"] = $team_id;
return $teamMember;
}