protected int UpdateMany(IEnumerable items, ISchema schema, IDataUpdateOptions options = null)
{
//确认是否可以执行该操作
this.EnsureUpdate(options);
if (items == null)
{
return(0);
}
//构建数据操作的选项对象
if (options == null)
{
options = new DataUpdateOptions();
}
//进行授权验证
this.Authorize(DataServiceMethod.UpdateMany(), options);
//将当前更新数据集合对象转换成数据字典集合
var dictionares = DataDictionary.GetDictionaries <TModel>(items);
//修正数据模式对象
schema = this.Schematic(schema, Common.TypeExtension.GetElementType(items.GetType()));
foreach (var dictionary in dictionares)
{
//验证待更新的数据
this.OnValidate(DataServiceMethod.UpdateMany(), schema, dictionary, options);
}
return(this.OnUpdateMany(dictionares, schema, options));
}
public static bool HasBehaviors(this IDataUpdateOptions options, UpdateBehaviors behaviors)
{
if (options == null)
{
return(false);
}
return((options.Behaviors & behaviors) == behaviors);
}
public static IDataUpdateOptions DisableBehaviors(this IDataUpdateOptions options, UpdateBehaviors behaviors)
{
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
options.Behaviors &= ~behaviors;
return(options);
}
public DataUpdateContext(IDataAccess dataAccess, string name, bool isMultiple, object data, ICondition criteria, ISchema schema, IDataUpdateOptions options = null) : base(dataAccess, name, isMultiple, data, criteria, schema, options)
{
this.Aliaser = new Common.Expressions.Aliaser();
this.Provider = DataEnvironment.Providers.GetProvider(dataAccess.Name);
this.Session = DataAccessContextUtility.GetSession(() => this.Provider.Multiplexer.GetSource(this));
}
protected int Update(object data, ICondition criteria, ISchema schema, IDataUpdateOptions options = null)
{
//确认是否可以执行该操作
this.EnsureUpdate(options);
if (data == null)
{
return(0);
}
//构建数据操作的选项对象
if (options == null)
{
options = new DataUpdateOptions();
}
//进行授权验证
this.Authorize(DataServiceMethod.Update(), options);
//将当前更新数据对象转换成数据字典
var dictionary = DataDictionary.GetDictionary <TModel>(data);
//如果指定了更新条件，则尝试将条件中的主键值同步设置到数据字典中
if (criteria != null)
{
//获取当前数据服务的实体主键集
var keys = this.DataAccess.Metadata.Entities.Get(this.Name).Key;
if (keys != null && keys.Length > 0)
{
foreach (var key in keys)
{
criteria.Match(key.Name, c => dictionary.TrySetValue(c.Name, c.Value));
}
}
}
//修整过滤条件
criteria = this.OnValidate(DataServiceMethod.Update(), criteria ?? this.GetUpdateKey(dictionary), options.Filter, options);
//修正数据模式对象
schema = this.Schematic(schema, data.GetType());
//验证待更新的数据
this.OnValidate(DataServiceMethod.Update(), schema, dictionary, options);
//如果缺少必须的更新条件则抛出异常
if (criteria == null)
{
//再次从数据中获取主键条件
criteria = this.GetUpdateKey(dictionary);
if (criteria == null)
{
throw new DataOperationException($"The update operation of the specified ‘{this.Name}’ entity missing required conditions.");
}
}
//执行更新操作
return(this.OnUpdate(dictionary, criteria, schema, options));
}