PermissionSettingHelper.AddObjectPermissionFromLambda<T>(IPermissionPolicyRole, String, Expression<Func<T, Boolean>>, Nullable<SecurityPermissionState>) Method
Finds the first type permission for the specified type in the role and adds the object permission to it. If the appropriate type permission is not found, this method creates it.
Namespace: DevExpress.ExpressApp.Security
Assembly: DevExpress.ExpressApp.Security.v24.2.dll
NuGet Package: DevExpress.ExpressApp.Security
#Declaration
public static IPermissionPolicyObjectPermissionsObject AddObjectPermissionFromLambda<T>(
this IPermissionPolicyRole role,
string operations,
Expression<Func<T, bool>> lambda,
SecurityPermissionState? state
)
where T : class
#Parameters
Name | Type | Description |
---|---|---|
role | IPermission |
The target role for a new object permission. |
operations | String | The semicolon-separated list of security operations. The static Security |
lambda | Expression<Func<T, Boolean>> | The lambda expression that specifies the target object |
state | Nullable<Security |
A Security |
#Type Parameters
Name | Description |
---|---|
T | This method finds the type permission for this type in the role. |
#Returns
Type | Description |
---|---|
DevExpress. |
The added object permission. |
#Remarks
The following example demonstrates how to use this method in UpdateDatabaseAfterUpdateSchema() (MySolution.Module\DatabaseUpdater\Updater.cs(.vb)):
using DevExpress.Data.Filtering;
using DevExpress.ExpressApp.Security;
using DevExpress.ExpressApp.SystemModule;
using DevExpress.ExpressApp.Updating;
using DevExpress.Persistent.Base;
using DevExpress.Persistent.BaseImpl.PermissionPolicy;
// ...
public class Updater : ModuleUpdater {
// ...
public override void UpdateDatabaseAfterUpdateSchema() {
base.UpdateDatabaseAfterUpdateSchema();
PermissionPolicyRole defaultRole = ObjectSpace.FirstOrDefault<PermissionPolicyRole>(role => role.Name == "Default");
if(defaultRole == null) {
defaultRole = ObjectSpace.CreateObject<PermissionPolicyRole>();
defaultRole.AddObjectPermissionFromLambda<PermissionPolicyUser>(
SecurityOperations.Read,
u => u.Oid == (Guid)CurrentUserIdOperator.CurrentUserId(),
SecurityPermissionState.Allow
);
// ...
}
// ...
}
}
Note
Alternatively, you can use the Add