/// <summary>
/// 获取实体
/// </summary>
/// <param name="row">数据行</param>
/// <param name="columns">列集合</param>
/// <returns>数据表实体</returns>
protected override T CreateEntity(DataRow row, DataColumnCollection columns)
{
T entity = new T();
PropertyInfo[] props = this._entityType.GetProperties();
foreach (PropertyInfo prop in props)
{
DatabaseColumnAtrribute attr = null;
if (this._columns.TryGetValue(prop.Name, out attr) && attr != null)
{
DbType dbType = (attr.DbType.HasValue ? attr.DbType.Value : DbTypeHelper.InternalGetDbType(prop.PropertyType));
Object value;
if (this.IsNullableType(prop.PropertyType))
{
value = this.LoadNullableValue(row, columns, attr.ColumnName, dbType);
}
else
{
value = this.LoadValue(row, columns, attr.ColumnName, dbType);
}
prop.SetValue(entity, value, null);
}
}
return(entity);
}
public static bool Equals(Column a, Column b)
{
if (a.Table.Name.EqualsIgnoreCase(b.Table.Name) &&
a.Name.EqualsIgnoreCase(b.Name) &&
DbTypeHelper.IsCompatible(a.DataType, b.DataType) &&
//a.DataType == b.DataType &&
a.IsRequired == b.IsRequired &&
a.IsForeignKey == b.IsForeignKey &&
a.IsPrimaryKey == b.IsPrimaryKey
)
{
//判断外键是否相等
//暂时不考虑NeedDeleteCascade是否相同的问题
if (a.IsForeignKey &&
!a.ForeignConstraint.PKColumn.Table.Name.EqualsIgnoreCase(b.ForeignConstraint.PKColumn.Table.Name))
{
return(false);
}
else
{
return(true);
}
}
else
{
return(false);
}
}
/// <summary>
/// 生成与 Sql 配套的参数列表。
/// </summary>
/// <param name="meta">The meta.</param>
/// <returns></returns>
private IDbDataParameter[] GenerateUpdateParameters(EntityBatch meta)
{
var dba = meta.DBA.RawAccesser;
var table = meta.Table;
//把所有实体中所有属性的值读取到数组中，参数的值就是这个数组。
var updateLOB = this.UpdateLOB;
var parameters = new List <IDbDataParameter>();
var columns = table.Columns;
for (int i = 0, c = columns.Count; i < c; i++)
{
var column = columns[i];
if (!column.Info.IsPrimaryKey && (updateLOB || !column.IsLOB))
{
var parameter = dba.ParameterFactory.CreateParameter();
parameter.ParameterName = '@' + column.Name;
parameter.SourceColumn = column.Name;//额外地，需要设置 SourceColumn
parameter.DbType = column.Info.ColumnMeta.DataType ?? DbTypeHelper.ConvertFromCLRType(column.Info.DataType);
parameters.Add(parameter);
}
}
//主键列放在最后。
var pkParameter = dba.ParameterFactory.CreateParameter();
pkParameter.ParameterName = '@' + table.PKColumn.Name;
pkParameter.SourceColumn = table.PKColumn.Name;
pkParameter.DbType = table.PKColumn.Info.ColumnMeta.DataType ?? DbTypeHelper.ConvertFromCLRType(table.PKColumn.Info.DataType);
parameters.Add(pkParameter);
return(parameters.ToArray());
}
public static DbType ConvertFromCLRType(Type clrType)
{
var value = DbTypeHelper.ConvertFromCLRType(clrType);
if (value == DbType.Boolean)
{
value = DbType.String;
}
return(value);
}
public void DMT_AlterColumn_DataType_AutoMigrate()
{
this.Test(destination =>
{
}, result =>
{
var table = result.FindTable("Task");
var column = table.FindColumn("XmlContent");
Assert.IsTrue(column != null);
var p = DbSetting.FindOrCreate(UnitTestEntityRepositoryDataProvider.DbSettingName).ProviderName;
Assert.IsTrue(DbTypeHelper.IsCompatible(column.DataType, DbType.Xml));
});
}
public void DMT_CreateColumn_Decimal()
{
this.Test(destination =>
{
var taskTable = destination.FindTable("Task");
taskTable.AddColumn("TestingColumn", DbType.Decimal, isRequired: true);
}, result =>
{
var taskTable = result.FindTable("Task");
var c1 = taskTable.FindColumn("TestingColumn");
Assert.IsTrue(c1 != null && c1.IsRequired);
Assert.IsTrue(DbTypeHelper.IsCompatible(c1.DataType, DbType.Decimal));
});
}
public void DMT_AlterColumn_DataType_NullStringToDouble()
{
this.Test(destination =>
{
var taskTable = destination.FindTable("Task");
taskTable.Columns.Remove(taskTable.FindColumn("Name"));
taskTable.AddColumn("Name", DbType.Double, isRequired: true);
}, result =>
{
var table = result.FindTable("Task");
var column = table.FindColumn("Name");
Assert.IsTrue(column != null);
Assert.IsTrue(DbTypeHelper.IsCompatible(column.DataType, DbType.Double));
Assert.IsTrue(column.IsRequired);
});
}
private static ColumnChanges Distinguish(Column oldColumn, Column newColumn)
{
//if (newColumn == null) throw new ArgumentNullException("newColumn");
//if (newColumn.Name.EqualsIgnoreCase(oldColumn.Name)) throw new InvalidOperationException("newColumn.Name.EqualsIgnoreCase(oldColumn.Name) must be false.");
//if (newColumn.Table.Name.EqualsIgnoreCase(oldColumn.Table.Name)) throw new InvalidOperationException("newColumn.Table.Name.EqualsIgnoreCase(oldColumn.Table.Name) must be false.");
ColumnChanges columnChanged = null;
if (!Equals(newColumn, oldColumn))
{
columnChanged = new ColumnChanges(oldColumn, newColumn, ChangeType.Modified);
if (newColumn.IsRequired != oldColumn.IsRequired)
{
columnChanged.IsRequiredChanged = true;
}
if (newColumn.IsPrimaryKey != oldColumn.IsPrimaryKey)
{
columnChanged.IsPrimaryKeyChanged = true;
}
if (!DbTypeHelper.IsCompatible(newColumn.DataType, oldColumn.DataType))
{
columnChanged.IsDbTypeChanged = true;
}
//ForeignRelationChangeType
columnChanged.ForeignRelationChangeType = ChangeType.UnChanged;
if (!newColumn.IsForeignKey && oldColumn.IsForeignKey)
{
columnChanged.ForeignRelationChangeType = ChangeType.Removed;
}
else if (newColumn.IsForeignKey && !oldColumn.IsForeignKey)
{
columnChanged.ForeignRelationChangeType = ChangeType.Added;
}
else if (newColumn.IsForeignKey && oldColumn.IsForeignKey)
{
if (!Equals(newColumn.ForeignConstraint, oldColumn.ForeignConstraint))
{
columnChanged.ForeignRelationChangeType = ChangeType.Modified;
}
}
}
return(columnChanged);
}
public void DMT_AlterColumn_DataType()
{
this.Test(destination =>
{
var taskTable = destination.FindTable("Task");
taskTable.Columns.Remove(taskTable.FindColumn("Name"));
taskTable.AddColumn("Name", DbType.Xml);
}, result =>
{
var table = result.FindTable("Task");
var column = table.FindColumn("Name");
Assert.IsTrue(column != null);
var p = DbSetting.FindOrCreate(UnitTestEntityRepositoryDataProvider.DbSettingName).ProviderName;
Assert.IsTrue(DbTypeHelper.IsCompatible(column.DataType, DbType.Xml));
});
}
public void DMT_CreateColumn_CLOB()
{
if (DbSetting.IsOracleProvider(UnitTest2EntityRepositoryDataProvider.DbSettingName))
{
this.Test(destination =>
{
var taskTable = destination.FindTable("Task");
taskTable.AddColumn("TestingColumn", DbType.String, "CLOB", isRequired: true);
}, result =>
{
var taskTable = result.FindTable("Task");
var c1 = taskTable.FindColumn("TestingColumn");
Assert.IsTrue(c1 != null && c1.IsRequired);
Assert.IsTrue(DbTypeHelper.IsCompatible(c1.DataType, DbType.String));
});
}
}
/// <summary>
/// 根据实体类型创建表的描述信息，并添加到数据库中
/// </summary>
/// <param name="em">The memory.</param>
/// <exception cref="System.ArgumentNullException"></exception>
/// <exception cref="System.InvalidOperationException">refMeta.ReferenceInfo == null</exception>
private void BuildTable(EntityMeta em)
{
var tableMeta = em.TableMeta;
//视图类不需要支持数据库迁移。
if (tableMeta.IsMappingView)
{
return;
}
var table = new Table(tableMeta.TableName, this.Database);
//读取实体的注释
if (_readComment)
{
table.Comment = _commentFinder.TryFindComment(em.EntityType);
}
var metaProperties = em.EntityProperties;
//var managedProperties = ManagedPropertyRepository.Instance
// .GetTypePropertiesContainer(em.EntityType)
// .GetNonReadOnlyCompiledProperties();
foreach (var property in metaProperties)
{
var columnMeta = property.ColumnMeta;
if (columnMeta == null)
{
continue;
}
var mp = property.ManagedProperty;
if (mp == null)
{
throw new ArgumentNullException(string.Format("{0}.{1} 属性需要使用托管属性进行编写。", em.Name, mp.Name));
}
//列名
var propertyName = property.Name;
var columnName = columnMeta.ColumnName;
if (string.IsNullOrWhiteSpace(columnName))
{
columnName = propertyName;
}
//类型
var propertyType = property.PropertyType;
bool isNullableRef = false;
#region 引用关系
if (columnMeta.HasFKConstraint)
{
var refProperty = mp as IRefProperty;
if (refProperty != null)
{
isNullableRef = refProperty.Nullable;
var refMeta = em.Property(refProperty.RefEntityProperty);
if (refMeta.ReferenceInfo == null)
{
throw new InvalidOperationException("refMeta.ReferenceInfo == null");
}
//引用实体的类型。
var refTypeMeta = refMeta.ReferenceInfo.RefTypeMeta;
if (refTypeMeta != null)
{
var refTableMeta = refTypeMeta.TableMeta;
if (refTableMeta != null)
{
//如果主键表已经被忽略，那么到这个表上的外键也不能建立了。
//这是因为被忽略的表的结构是未知的，不一定是以这个字段为主键。
if (!this.Database.IsIgnored(refTableMeta.TableName))
{
var id = refTypeMeta.Property(Entity.IdProperty);
//有时一些表的 Id 只是自增长，但并不是主键，不能创建外键。
if (id.ColumnMeta.IsPrimaryKey)
{
this._foreigns.Add(new ForeignConstraintInfo()
{
FkTableName = tableMeta.TableName,
PkTableName = refTableMeta.TableName,
FkColumn = columnName,
PkColumn = id.ColumnMeta.ColumnName,
NeedDeleteCascade = refProperty.ReferenceType == ReferenceType.Parent
});
}
}
}
}
}
else if (mp == Entity.TreePIdProperty)
{
var id = em.Property(Entity.IdProperty);
//有时一些表的 Id 只是自增长，但并不是主键，不能创建外键。
if (id.ColumnMeta.IsPrimaryKey)
{
this._foreigns.Add(new ForeignConstraintInfo()
{
FkTableName = tableMeta.TableName,
PkTableName = tableMeta.TableName,
FkColumn = columnName,
PkColumn = id.ColumnMeta.ColumnName,
NeedDeleteCascade = false
});
}
}
}
#endregion
var dataType = TypeHelper.IgnoreNullable(propertyType);
//对于支持多数据类型的 Id、TreePId 属性进行特殊处理。
if (mp == Entity.IdProperty || mp == Entity.TreePIdProperty)
{
dataType = em.IdType;
}
var dbType = columnMeta.DataType.GetValueOrDefault(DbTypeHelper.ConvertFromCLRType(dataType));
var column = new Column(columnName, dbType, columnMeta.DataTypeLength, table);
if (columnMeta.IsRequired.HasValue)
{
column.IsRequired = columnMeta.IsRequired.Value;
}
else
{
column.IsRequired = !isNullableRef && !propertyType.IsClass && !TypeHelper.IsNullable(propertyType);
}
//IsPrimaryKey 的设置放在 IsRequired 之后，可以防止在设置可空的同时把列调整为非主键。
column.IsPrimaryKey = columnMeta.IsPrimaryKey;
column.IsIdentity = columnMeta.IsIdentity;
table.Columns.Add(column);
//读取属性的注释。
if (_readComment)
{
var commentProperty = mp;
var refProperty = commentProperty as IRefProperty;
if (refProperty != null)
{
commentProperty = refProperty.RefEntityProperty;
}
column.Comment = _commentFinder.TryFindComment(commentProperty);
}
}
table.SortColumns();
this.AddTable(table);
}
/// <summary>
/// 创建新的Sql语句参数类
/// </summary>
/// <param name="columnName">字段名</param>
/// <param name="parameterName">参数名</param>
/// <param name="value">赋值内容</param>
/// <returns>Sql语句参数类</returns>
public static SqlParameter Create(String columnName, String parameterName, Object value)
{
return(SqlParameter.Create(columnName, parameterName, DbTypeHelper.InternalGetDbType(value), value));
}
/// <summary>
/// 创建新的Sql语句参数类
/// </summary>
/// <param name="columnName">字段名</param>
/// <param name="value">赋值内容</param>
/// <returns>Sql语句参数类</returns>
public static SqlParameter Create(String columnName, Object value)
{
return(SqlParameter.Create(columnName, columnName.Replace("(", "_").Replace(")", ""), DbTypeHelper.InternalGetDbType(value), value));
}