/// <summary>
/// 判断用户是否有指定数据的所有权
/// 如果部分数据不存在，会返回false
/// </summary>
/// <typeparam name="TData">数据类型</typeparam>
/// <param name="userId">用户Id</param>
/// <param name="ids">数据Id列表</param>
/// <returns></returns>
public virtual bool HasOwnership <TData>(long userId, IList <object> ids)
where TData : class, IEntity
{
// 检查数据类型是否有所属用户
var userOwnedTrait = UserOwnedTrait.For <TData>();
if (!userOwnedTrait.IsUserOwned)
{
throw new ArgumentException(string.Format("type {0} not user owned", typeof(TData).Name));
}
// 构建表达式 (data => ids.Contains(data.Id) && data.Owner.Id == userId)
var entityTrait = EntityTrait.For <TData>();
var userEntityTrait = EntityTrait.For <User>();
var dataParam = Expression.Parameter(typeof(TData), "data");
var body = Expression.AndAlso(
Expression.Call(
IListContainsMethodInfo.Value,
Expression.Constant(ids.Select(id =>
id.ConvertOrDefault(entityTrait.PrimaryKeyType, null)).ToList()),
Expression.Convert(
Expression.Property(dataParam, entityTrait.PrimaryKey), typeof(object))),
Expression.Equal(
Expression.Property(
Expression.Property(dataParam, userOwnedTrait.PropertyName),
userEntityTrait.PrimaryKey),
Expression.Constant(userId)));
var count = UnitOfWork.ReadData <TData, long>(r => {
return(r.Count(Expression.Lambda <Func <TData, bool> >(body, dataParam)));
});
return(count == ids.Count);
}
/// <summary>
/// 获取指定Id的单个对象，找不到时返回null
/// </summary>
/// <param name="id">数据Id</param>
/// <returns></returns>
public virtual TData GetById(object id)
{
var trait = EntityTrait.For <TData>();
return(Get(ExpressionUtils.MakeMemberEqualiventExpression <TData>(
trait.PrimaryKey,
id.ConvertOrDefault(trait.PrimaryKeyType, null))));
}
/// <summary>
/// 批量永久删除
/// 返回删除的数量
/// 这个函数会把数据从数据库中删除
/// </summary>
/// <param name="ids">Id列表</param>
/// <returns></returns>
public virtual long BatchDeleteForever(IEnumerable <object> ids)
{
var databaseManager = Application.Ioc.Resolve <DatabaseManager>();
var trait = EntityTrait.For <TData>();
long count = 0;
foreach (var id in ids)
{
count += Context.BatchDelete(
ExpressionUtils.MakeMemberEqualiventExpression <TData>(
trait.PrimaryKey,
id.ConvertOrDefault(trait.PrimaryKeyType, null)));
}
return(count);
}
/// <summary>
/// 按所属用户等于指定用户过滤数据
/// </summary>
/// <typeparam name="TData">数据类型</typeparam>
/// <param name="query">查询对象</param>
/// <param name="userId">用户Id</param>
/// <returns></returns>
public static IQueryable <TData> FilterByOwnedUser <TData>(
this IQueryable <TData> query, long userId)
{
// 构建表达式 (data => data.Owner.Id == userId)
var userOwnedTrait = UserOwnedTrait.For <TData>();
var userEntityTrait = EntityTrait.For <User>();
var dataParam = Expression.Parameter(typeof(TData), "data");
var body = Expression.Equal(
Expression.Property(
Expression.Property(dataParam, userOwnedTrait.PropertyName),
userEntityTrait.PrimaryKey),
Expression.Constant(userId));
return(query.Where(Expression.Lambda <Func <TData, bool> >(body, dataParam)));
}
/// <summary>
/// 添加删除按钮
/// 点击后弹出确认框，确认后把json=[数据Id]提交到删除url
/// </summary>
/// <param name="column">操作列</param>
/// <param name="typeName">类型名称</param>
/// <param name="deleteUrl">删除使用的Url</param>
/// <param name="name">名称，不指定时使用默认值</param>
/// <param name="buttonClass">按钮的Css类，不指定时使用默认值</param>
/// <param name="iconClass">图标的Css类，不指定时使用默认值</param>
/// <param name="titleTemplate">标题的模板，格式是underscore.js的格式，参数传入rows</param>
/// <param name="urlTemplate">编辑Url的模板，格式是underscore.js的格式，参数传入rows</param>
/// <param name="primaryKey">数据Id保存的名称，不指定时使用默认值</param>
/// <param name="dialogParameters">弹出框的参数，不指定时使用默认值</param>
public static void AddDeleteAction(
this AjaxTableActionColumn column, string typeName, string deleteUrl,
string name = null, string buttonClass = null, string iconClass = null,
string titleTemplate = null, string urlTemplate = null,
string primaryKey = null, object dialogParameters = null)
{
primaryKey = primaryKey ?? EntityTrait.For <object>().PrimaryKey;
column.AddConfirmActionForBelongedRow(
name ?? new T("Delete"),
buttonClass ?? "btn btn-xs btn-danger",
iconClass ?? "fa fa-remove",
titleTemplate ?? string.Format(new T("Delete {0}"), new T(typeName)),
ScriptStrings.ConfirmMessageTemplateForMultiSelected(
string.Format(new T("Sure to delete following {0}?"), new T(typeName)), "ToString"),
ScriptStrings.PostConfirmedActionForMultiSelected(primaryKey, deleteUrl),
dialogParameters);
}
/// <summary>
/// 获取指定Id的单个对象，找不到或标记已删除时返回null
/// </summary>
/// <param name="id">数据Id</param>
/// <returns></returns>
public virtual TData GetByIdWhereNotDeleted(object id)
{
// 判断类型是否可回收
var entityTrait = EntityTrait.For <TData>();
var recyclableTrait = RecyclableTrait.For <TData>();
if (!recyclableTrait.IsRecyclable)
{
throw new ArgumentException(string.Format("entity {0} not recyclable", typeof(TData).Name));
}
// 构建表达式 (data => data.Id == id && !data.Deleted)
var dataParam = Expression.Parameter(typeof(TData), "data");
var body = Expression.AndAlso(
Expression.Equal(
Expression.Property(dataParam, entityTrait.PrimaryKey),
Expression.Constant(id.ConvertOrDefault(entityTrait.PrimaryKeyType, null))),
Expression.Not(Expression.Property(dataParam, recyclableTrait.PropertyName)));
return(Get(Expression.Lambda <Func <TData, bool> >(body, dataParam)));
}
/// <summary>
/// 批量恢复
/// 返回恢复的数量
/// </summary>
/// <param name="ids">Id列表</param>
/// <returns></returns>
public virtual long BatchRecover(IEnumerable <object> ids)
{
var databaseManager = Application.Ioc.Resolve <DatabaseManager>();
var propertyName = RecyclableTrait.For <TData>().PropertyName;
var setter = ReflectionUtils.MakeSetter <TData, bool>(propertyName);
var trait = EntityTrait.For <TData>();
long count = 0;
foreach (var id in ids)
{
var data = Context.Get(
ExpressionUtils.MakeMemberEqualiventExpression <TData>(
trait.PrimaryKey,
id.ConvertOrDefault(trait.PrimaryKeyType, null)));
if (data != null)
{
Context.Save(ref data, d => setter(d, false));
++count;
}
}
return(count);
}
/// <summary>
/// 添加删除相关的按钮
/// 如果数据类型可以回收，则添加批量删除或批量恢复和永久删除
/// 如果数据类型不可以回收，则添加批量永久删除
/// </summary>
/// <param name="column">Id列</param>
/// <param name="request">搜索请求</param>
/// <param name="dataType">数据类型</param>
/// <param name="typeName">类型名称</param>
/// <param name="batchUrl">批量操作使用的Url</param>
public static void AddDeleteActions(
this AjaxTableIdColumn column, AjaxTableSearchRequest request,
Type dataType, string typeName, string batchUrl)
{
// 判断需要添加哪些操作
bool addBatchDelete = false;
bool addBatchRecover = false;
bool addBatchDeleteForever = false;
if (RecyclableTrait.For(dataType).IsRecyclable)
{
var deleted = request.Conditions.GetOrDefault <bool>("Deleted");
addBatchDelete = !deleted;
addBatchRecover = deleted;
addBatchDeleteForever = deleted;
}
else
{
addBatchDeleteForever = true;
}
// 添加批量删除
typeName = new T(typeName);
var entityTrait = EntityTrait.For(dataType);
if (addBatchDelete)
{
column.AddConfirmActionForMultiChecked(
new T("Batch Delete"),
"fa fa-recycle",
string.Format(new T("Please select {0} to delete"), typeName),
new T("Batch Delete"),
ScriptStrings.ConfirmMessageTemplateForMultiSelected(
string.Format(new T("Sure to delete following {0}?"), typeName), "ToString"),
ScriptStrings.PostConfirmedActionForMultiSelected(
entityTrait.PrimaryKey, batchUrl + "?action=delete"),
new { type = "type-danger" });
}
// 添加批量恢复
if (addBatchRecover)
{
column.AddConfirmActionForMultiChecked(
new T("Batch Recover"),
"fa fa-history",
string.Format(new T("Please select {0} to recover"), typeName),
new T("Batch Recover"),
ScriptStrings.ConfirmMessageTemplateForMultiSelected(
string.Format(new T("Sure to recover following {0}?"), typeName), "ToString"),
ScriptStrings.PostConfirmedActionForMultiSelected(
entityTrait.PrimaryKey, batchUrl + "?action=recover"));
}
// 添加批量永久删除
if (addBatchDeleteForever)
{
column.AddConfirmActionForMultiChecked(
new T("Batch Delete Forever"),
"fa fa-remove",
string.Format(new T("Please select {0} to delete"), typeName),
new T("Batch Delete Forever"),
ScriptStrings.ConfirmMessageTemplateForMultiSelected(
string.Format(new T("Sure to delete following {0} forever?"), typeName), "ToString"),
ScriptStrings.PostConfirmedActionForMultiSelected(
entityTrait.PrimaryKey, batchUrl + "?action=delete_forever"),
new { type = "type-danger" });
}
}