SQL doesn't allow inserting a completely empty row without naming at least one column name. If your provided values is empty, no column names are known and an empty row can't be inserted. If not set to null, the nullColumnHack parameter provides the name of nullable column name to explici...
no column names are known and an empty row can't be inserted. If not set tonull, the nullColumnHack parameter provides the name of nullable column name to explicitly insert a NULL into in thecasewhere
nullable=false,unique=true,length=64)privateString username;@Column(name="password",nullable=false,length=255)privateString password;@Column(name="salt",nullable=false,length=16)privateString salt;@Column(name="status",nullable=false,length=16,columnDefinition="VARCHAR(16) DEFAULT 'active'")private...
Column('id',Integer,nullable=Table,autoincrement=True,primary_key=True), Column('name',String(20),nullable=True), Column('age',Integer,nullable=True) ) host=Table('host',meta, Column('ip',String(20),nullable=True), Column('hostname',String(20),nullable=True), ) meta.create_all(engine...
If not set to null, the nullColumnHack parameter provides the name of nullable column name to explicitly insert a NULL into in the case where your values is empty. values ContentValues this map contains the initial column values for the row. The keys should be the column names and the ...
这种情况下,虽然Link在C#是nullable,但是对sqlite是notnullable,所以 插入 var p = new PhotoDetails { Link = null }; db.Insertable(p).ExecuteCommand(); 抛异常 2.修改table,加入[SugarColumn(IsNullable = true)] internal class PhotoDetails { [SugarColumn(IsPrimaryKey = true, IsIdentity = true)]...
我一开始以为让所有的 SQLite Statement 共用一个(作为静态变数的) nullable OpaquePointer 就可以了,于是我一开始的设计就是让辞典模组在 deinit() 的时候才跑一次「 sqlite3_finalize()」。因为原厂词库是只读的、在 App Bundle 内,所以我将 journal 塞在了运存内。 结果呢?施工完毕之后,单元测试啥的都成功通...
string columnname = item.DbColumnName.ToLower(); //映射字段添加 (字段名,字段名,表名) db.MappingColumns.Add(columnname, columnname, table_name); } db.DbFirst. SettingClassTemplate(old => { string snp = "\r\n "; var sugartable = GetClassTemplate().Replace("{SugarTable}", @$"{snp...
[Column(TypeName="text")] publicDateTimeCreatedTime{get;set;} } /// ///实体类型定义,此处使用codefirstfluentapi方式 /// internalclassMyEntityTypeConfiguration:IEntityTypeConfiguration<MyEntity> { publicvoidConfigure(EntityTypeBuilder<MyEntity>entity) { entity.ToTable(nameof...
publicclassUserDbHelperextendsSQLiteOpenHelper{privatestaticUserDbHelper sHelper;privatestaticfinal StringDB_NAME="user_info.db";//数据库名privatestaticfinal intVERSION=1;//版本号//必须实现其中一个构方法publicUserDbHelper(@Nullable Context context,@Nullable String name,@Nullable SQLiteDatabase.CursorFactory...