protected bool Exists(OneOptions options)
{
if (options == null)
{
throw new ArgumentNullException("options");
}
var findArgs = new FindOneArgs {
Query = options.GetMongoQuery(_getIdValue),
Fields = Fields.Include(CommonFieldNames.Id),
ReadPreference = ReadPreference.Primary
};
return(_collection.FindOneAs <T>(findArgs) != null);
}
/// <summary>
/// 查询单条数据
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="Field">查询属性字段</param>
/// <param name="Value">字段值</param>
/// <returns>返回当前实体</returns>
public T FindOne <T>(string Field, string Value)
{
T oneEntity = default(T);
try
{
FindOneArgs args = new FindOneArgs
{
Query = Query.EQ(Field, Value)
};
oneEntity = this._db.GetCollection(typeof(T).Name).FindOneAs <T>(args);
this._db.GetCollection(typeof(T).Name).FindAs <T>(Query.GTE(Field, Value)).ToList();
}
catch (Exception ex)
{
}
return(oneEntity);
}
protected TModel FindOne <TModel>(OneOptions options) where TModel : class, new()
{
if (options == null)
{
throw new ArgumentNullException("options");
}
TModel result = null;
if (options.UseCache)
{
result = Cache.Get <TModel>(GetScopedCacheKey(options.CacheKey));
}
if (result != null)
{
return(result);
}
var findArgs = new FindOneArgs {
Query = options.GetMongoQuery(_getIdValue), Fields = Fields.Include(options.Fields.ToArray())
};
var mongoOptions = options as MongoOptions;
if (mongoOptions != null && mongoOptions.SortBy != null)
{
findArgs.SortBy = mongoOptions.SortBy;
}
if (mongoOptions != null && mongoOptions.ReadPreference != null)
{
findArgs.ReadPreference = mongoOptions.ReadPreference;
}
result = _collection.FindOneAs <TModel>(findArgs);
if (result != null && options.UseCache)
{
Cache.Set(GetScopedCacheKey(options.CacheKey), result, options.GetCacheExpirationDate());
}
return(result);
}
public virtual TResource GetResource(string id, params Expression <Func <TResource, object> >[] explicitPropertyList)
{
var mongoQuery = Query.And(
Query.NotExists("_deleted"),
Query <TResource> .EQ(r => r.Id, id));
var args = new FindOneArgs
{
Query = mongoQuery,
Fields = Fields <TResource> .Include(explicitPropertyList)
};
if (explicitPropertyList.Length > 0)
{
//need to add the type discriminator
args.Fields.ToBsonDocument().Add("_t", 1);
}
return(ResourceCollection.FindOneAs <TResource>(args));
}
