Android上的java ORMLite在创建包含enum类型的列和默认值的表时引发异常

Question

我的一个业务对象获得了类型为CommunicationMedium（枚举）的成员

public enum CommunicationMedium {
    EMAIL,
    PHONE,
    MOBILE,
    FACSIMILE,
    HOMEPAGE
}

名为CommunicationData的业务对象的注释如下所示

@DatabaseTable(tableName="store_communication_data")
public class CommunicationData{

    public static final String STORE_ID ="store_id";
    public static final String TABLE_NAME = "store_communication_data";
    public static final String MEDIUM_COLUMN_NAME = "medium";
    public static final String VALUE_COLUMN_NAME = "value";

    @DatabaseFieldSimple(canBeNull=false, columnName=STORE_ID)
    @DatabaseFieldForeign(foreign=true)
    private Store store;

    @DatabaseFieldSimple(canBeNull=false, columnName=MEDIUM_COLUMN_NAME, defaultValue="CommunicationMedium.EMAIL")
    @DatabaseFieldOther(dataType=DataType.ENUM_STRING)
    private CommunicationMedium communicationMedium;        

    @DatabaseFieldSimple(canBeNull=false, columnName=VALUE_COLUMN_NAME)
    private String value; 
    ...
}

在访问数据库帮助程序时，在创建CommunicationData类的表时，第一次引发以下异常。medium列的默认值似乎有问题

java.sql.SQLException: SQL statement failed: CREATE TABLE `store_communication_data` (`medium` __ormlite__ no default value string was specified , `store_id` INTEGER NOT NULL , `value` VARCHAR NOT NULL ) 
     at com.j256.ormlite.misc.SqlExceptionUtil.create(SqlExceptionUtil.java:22)
     at com.j256.ormlite.table.TableUtils.doStatements(TableUtils.java:458)
     at com.j256.ormlite.table.TableUtils.doCreateTable(TableUtils.java:436)
     at com.j256.ormlite.table.TableUtils.createTable(TableUtils.java:223)
     at com.j256.ormlite.table.TableUtils.createTable(TableUtils.java:53)
     ...
Caused by: java.sql.SQLException: Problems executing Android statement: CREATE TABLE `store_communication_data` (`medium` __ormlite__ no default value string was specified , `store_id` INTEGER NOT NULL , `value` VARCHAR NOT NULL ) 
     at com.j256.ormlite.misc.SqlExceptionUtil.create(SqlExceptionUtil.java:22)
     at com.j256.ormlite.安卓.AndroidCompiledStatement.runUpdate(AndroidCompiledStatement.java:71)
     at com.j256.ormlite.table.TableUtils.doStatements(TableUtils.java:452)
     ...
Caused by: 安卓.database.sqlite.SQLiteException: near "string": syntax error: , while compiling: CREATE TABLE `store_communication_data` (`medium` __ormlite__ no default value string was specified , `store_id` INTEGER NOT NULL , `value` VARCHAR NOT NULL ) 
     at 安卓.database.sqlite.SQLiteProgram.native_compile(Native Method)
     at 安卓.database.sqlite.SQLiteProgram.compile(SQLiteProgram.java:110)
     at 安卓.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:59)
     at 安卓.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:41)
     at 安卓.database.sqlite.SQLiteDatabase.compileStatement(SQLiteDatabase.java:1026)
     ...

Answer 1

废话。这是一个在4.26版的columnDefinition特性中引入的bug，在4.27版中修复。如果使用@DatabaseFieldOther注释而不指定columnDefinition，将触发此错误。您现在可以通过添加columnDefinition值@Flo来解决这个问题：

@DatabaseFieldSimple(canBeNull = false, columnName = MEDIUM_COLUMN_NAME, defaultValue = "EMAIL")
@DatabaseFieldOther(dataType = DataType.ENUM_STRING, columnDefinition = "VARCHAR(100) DEFAULT 'EMAIL' NOT NULL")
private CommunicationMedium communicationMedium;

{a1}被添加到我们的bug跟踪系统中，我在版本4.27中修复了它。 对不起