Question

我有两个带注释的ActiveAndroid模型类，术语和课程（一对多关系）。

我能够创建Term和Course对象，并在其上调用.save（）而不会出现任何错误。

但是，当我尝试在直接访问其成员之外查询对象时，收到错误消息：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.gilbertdev.wgu.c196.abm1">

    <application
        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">
        <meta-data
            android:name="AA_MODELS"
            android:value="com.gilbertdev.wgu.c196.abm1.Term, com.gilbertdev.wgu.c196.abm1.Course" />
        <meta-data android:name="AA_DB_VERSION" android:value="10" />
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

或者如果我尝试查询课程，则类似。

据我所知，我尚未更改架构。

我尝试过的事情： 1.在模拟器中卸载并重新安装应用程序。 2.在Android清单中更改AA_DB_VERSION。

清单：

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation files('libs/activeandroid-3.0.jar')
}

依赖项：

package com.gilbertdev.wgu.c196.abm1;

import com.activeandroid.Model;
import com.activeandroid.annotation.Column;
import com.activeandroid.annotation.Table;

import java.util.Date;

@Table(name = "Terms")
public class Term extends Model {

    @Column(name = "title")
    public String title;

    @Column(name = "startdate")
    public Date startdate;

    @Column(name = "enddate")
    public Date enddate;

    //@Column(name = "course")
    //public Course course;

    public Term () {
        super();
    }
}

Term.java

package com.gilbertdev.wgu.c196.abm1;

import com.activeandroid.Model;
import com.activeandroid.annotation.Column;
import com.activeandroid.annotation.Table;

import java.util.Date;

@Table(name = "Courses")
public class Course extends Model {

    @Column(name = "title")
    public String title;

    @Column(name = "startdate")
    public Date startdate;

    @Column(name = "enddate")
    public Date enddate;

    @Column(name = "status")
    public String status;

    @Column(name = "term")
    public Term term;

    public Course() {
        super();
    }
}

Course.java

package com.gilbertdev.wgu.c196.abm1;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;

import com.activeandroid.ActiveAndroid;
import com.activeandroid.Model;
import com.activeandroid.query.Select;

import java.util.Date;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    TextView testView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ActiveAndroid.initialize(this);
        setContentView(R.layout.activity_main);

        testView = (TextView) findViewById(R.id.testtext);

        testView.append("\nGilbert\n");

        Term firstterm = new Term();
        firstterm.title = "First term";
        firstterm.startdate = new Date(1991, 2, 20);
        firstterm.enddate = new Date(2100, 2, 20);
        firstterm.save();

        Course firstcourse = new Course();
        firstcourse.title = "First course";
        firstcourse.startdate = new Date(2018, 1, 13);
        firstcourse.enddate = new Date(2018, 1, 20);
        firstcourse.status = "In Progress";
        firstcourse.term = firstterm;
        firstcourse.save();

        testView.append(firstterm.title + "\n");
        testView.append(firstterm.startdate + "\n");
        testView.append(firstcourse.term.title + "\n");

        try {

            List<Course> courses = new Select()
                    .from(Course.class)
                    .where("Term = ?", firstterm.getId())
                    .orderBy("title ASC")
                    .execute();

            for (Course course : courses) {
                testView.append(course.status);
            }

//            Term test = new Select().from(Term.class).orderBy("RANDOM()").executeSingle();
//            testView.append(test.title);

        } catch (Exception e) {
            testView.append(e.getMessage());
        }
    }
}

MainActivity.java

function Test-Upload(){
    Param()

        Process{
    $data=@"
    {
    "fields":
    {
        "project":
        {
            "key": "CCWASSET"
        },

        "summary": "Testing Linked Field",
        "issuetype":
        {
            "name": "Asset"
        },
        "description" : "Testing Linked Field"
    },
   "update":{
      "customfield_10500":[
         {
            "set":{
               "type":{
                  "name":"Asset PO",
                  "inward":"Asset",
                  "outward":"Purchase Order"
               },
               "outwardIssue":{
                  "key":""
               }
            }
         }
      ]
   }
}
"@
        return Jira-WebRequest -data $data

    }
}


function Jira-WebRequest(){
    Param(
        [Parameter(mandatory=$false)]$data,
        [Parameter(mandatory=$false)]$requesttype="issue",
        [Parameter(mandatory=$false)]$method="POST",
        [Parameter(mandatory=$false)]$ContentType='application/json'
    )
    Process{
        $path = $("/rest/api/2/$requesttype/")
        $Uri = ""
        [URI]::TryCreate([URI]::new($Settings.Jira.URL),"$path",$([ref]$Uri))

        $Params = @{
            ContentType =  $ContentType
            Body = $data #$(@{"vlan_id"=$vlanID;"port_id"="$portID";"port_mode"="$portMode"} | ConvertTo-JSON)
            Method = $method
            URI = $uri.AbsoluteUri
            Headers =  $JiraHeaders
            #WebSession = $Session
        }

        try{
            $result = Invoke-RestMethod @Params -Verbose
            return $result
        } Catch [System.Net.WebException] {
          $exception = $_.Exception
          $respstream = $exception.Response.GetResponseStream()
          $sr = new-object System.IO.StreamReader $respstream
          $ErrorResult = $sr.ReadToEnd()
          return $ErrorResult
        }
    }
}

Answer 1

我尝试了另一个ORM并遇到了同样的问题，所以我发现发生了一些不适用于ActiveAndroid的奇怪事件。我使用Android Studio中的设备文件资源管理器复制了两个ORM创建的SQLite DB文件，打开它们，然后看到没有创建任何表，并且在调用.save（）后看不到任何数据可持久化

如何修复：

在Android Studio中禁用即时运行

在Mac上，导航至Android Studio->首选项->构建，执行，部署->即时运行，然后取消选中启用即时运行。

清除您现有的数据库文件，以便您的ORM可以重建它们

您可以在Android Studio中执行以下操作，方法是依次导航到“视图”->“工具窗口”->“设备文件资源管理器”，然后选择“ data / data / com.yoursite.yourapp / databases”，然后删除所有相关的.db文件。

ActiveAndroid错误-编译时无此表格-仅在选择数据时

1 个答案: