Question

任何人都可以从以下错误消息“ errno：150”给我一个解决方案，外键约束的格式不正确“）”吗？当我想使用email属性创建从用户表到个人资料表的外键时，会出现问题，其中个人资料表中的主键是电子邮件本身。

表格用户

Schema::create('users', function (Blueprint $table) {
        $table->bigInteger('id', 20)->autoIncrement();
        $table->string('id_provider', 20)->nullable();
        $table->string('provider_name', 255);
        $table->string('email', 255)->unique();
        $table->foreign('email', 255)->references('email')->on('profile')->onDelete('cascade');
        $table->timestamp('email_verified_at')->nullable();
        $table->string('password', 255)->nullable();
        $table->string('role', 12);
        $table->rememberToken();
        $table->timestamps();
        $table->primary('id');
    });

模型用户

/**
 * Get the profile record associated with user.
 */
public function profile()
{
    return $this->hasOne('App\Profile');
}

塔贝尔个人资料

Schema::create('profile', function (Blueprint $table) {
        $table->string('email', 255)->unique();
        $table->string('name', 255);
        $table->integer('phone_number', 12)->nullable();
        $table->string('gender', 6)->nullable();
        $table->integer('date', 2)->nullable();
        $table->string('month', 9)->nullable();
        $table->integer('year', 4)->nullable();
        $table->bigInteger('id_address', 20)->nullable();
        $table->string('avatar', 100);
        $table->primary('email');
    });

型号简介

 /**
 * Get the user that owns the profile.
 */
public function user()
{
    return $this->belongsTo('App\User');
}

感谢您提供所有解决方案。

Answer 1

public class SearchActivity extends AppCompatActivity implements ContactsAdapter.ContactsAdapterListener { ........... private SearchView searchView; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_search); SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE); searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName())); searchView.setIconifiedByDefault(false); searchView.setFocusable(true); searchView.requestFocusFromTouch(); searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() { @Override public boolean onQueryTextSubmit(String s) { mAdapter.getFilter().filter(s); searchView.clearFocus(); return false; } @Override public boolean onQueryTextChange(String s) { mAdapter.getFilter().filter(s); return true; } }); }

您的用户模型：

 <application
    android:name="app.MyApplication"
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name="activities.SearchActivity"
        android:launchMode="singleTop">
        <intent-filter>
            <action android:name="android.intent.action.SEARCH" />
        </intent-filter>
        <meta-data android:name="android.app.searchable"
            android:resource="@xml/searchable"/>
    </activity>
 </application>

您的个人资料模型：

$table->foreign('email')->references('email')->on('profile');

Answer 2

外键列为STRING unique（），引用列的类型为PRIMARY，而不是STRING。在个人资料表中，有两列名称相同但类型不同。

表配置文件

Schema::create('profile', function (Blueprint $table) {
    $table->string('email', 255)->unique();
    $table->string('name', 255);
    $table->integer('phone_number', 12)->nullable();
    $table->string('gender', 6)->nullable();
    $table->integer('date', 2)->nullable();
    $table->string('month', 9)->nullable();
    $table->integer('year', 4)->nullable();
    $table->bigInteger('id_address', 20)->nullable();
    $table->string('avatar', 100);
    $table->primary('email'); <--------You have a mix up here. The column should be $table->primary('id')
});

errno：150“外键约束格式不正确”）

2 个答案: