Tag Management

CMS kit provides a tag system to tag any kind of resources, like a blog post.

Enabling the Tag Management Feature

By default, CMS Kit features are disabled. Therefore, you need to enable the features you want, before starting to use it. You can use the Global Feature system to enable/disable CMS Kit features on development time. Alternatively, you can use the ABP Framework's Feature System to disable a CMS Kit feature on runtime.

Check the "How to Install" section of the CMS Kit Module documentation to see how to enable/disable CMS Kit features on development time.

Options

The tag system provides a mechanism to group tags by entity types. For example, if you want to use the tag system for blog posts and products, you need to define two entity types named BlogPosts and Product and add tags under these entity types.

CmsKitTagOptions can be configured in the domain layer, in the ConfigureServices method of your module class.

Example: Adding tagging support for products

Configure<CmsKitTagOptions>(options =>
{
    options.EntityTypes.Add(new TagEntityTypeDefiniton("Product"));
});

If you're using the Blogging Feature, the ABP framework defines an entity type for the blog feature automatically.

CmsKitTagOptions properties:

• EntityTypes: List of defined entity types(TagEntityTypeDefiniton) in the tag system.

TagEntityTypeDefiniton properties:

• EntityType: Name of the entity type.
• DisplayName: The display name of the entity type. You can use a user-friendly display name to show entity type definition on the admin website.
• CreatePolicies: List of policy/permission names allowing users to create tags under the entity type.
• UpdatePolicies: List of policy/permission names allowing users to update tags under the entity type.
• DeletePolicies: List of policy/permission names allowing users to delete tags under the entity type.

The Tag Widget

The tag system provides a tag widget to display associated tags of a resource that was configured for tagging. You can simply place the widget on a page like the one below:

@await Component.InvokeAsync(typeof(TagViewComponent), new
{
  entityType = "Product",
  entityId = "...",
  urlFormat = "/products?tagId={TagId}&tagName={TagName}"
})

entityType was explained in the previous section. In this example, the entityId should be the unique id of the product. If you have a Product entity, you can use its Id here. urlFormat is the string format of the URL which will be generated for each tag. You can use the {TagId} and {TagName} placeholders to populate the URL. For example, the above URL format will populate URLs like /products?tagId=1&tagName=tag1.

The Popular Tags Widget

The tag system provides a popular tags widget to display popular tags of a resource that was configured for tagging. You can simply place the widget on a page as below:

@await Component.InvokeAsync(typeof(PopularTagsViewComponent), new
{
  entityType = "Product",
  urlFormat = "/products?tagId={TagId}&tagName={TagName}",
  maxCount = 10
})

entityType was explained in the previous section. urlFormat was explained in the previous section. maxCount is the maximum number of tags to be displayed.

User Interface

Menu Items

The following menu items are added by the tagging feature to the admin application:

• Tags: Opens the tag management page.

Pages

Tag Management

This page can be used to create, edit and delete tags for the entity types.

You can create or edit an existing tag on this page.

Internals

Domain Layer

Aggregates

This module follows the Entity Best Practices & Conventions guide.

Tag

A tag represents a tag under the entity type.

• Tag (aggregate root): Represents a tag in the system.

EntityTag

An entity tag represents a connection between the tag and the tagged entity.

• EntityTag(entity): Represents a connection between the tag and the tagged entity.

Repositories

This module follows the Repository Best Practices & Conventions guide.

The following custom repositories are defined for this feature:

• ITagRepository
• IEntityTagRepository

Domain services

This module follows the Domain Services Best Practices & Conventions guide.

Tag Manager

TagManager performs some operations for the Tag aggregate root.

Entity Tag Manager

EntityTagManager performs some operations for the EntityTag entity.

Application layer

Application services

• TagAdminAppService (implements ITagAdminAppService).
• EntityTagAdminAppService (implements IEntityTagAdminAppService).
• TagAppService (implements ITagAppService).

Database providers

Common

Table / Collection prefix & schema

All tables/collections use the Cms prefix by default. Set static properties on the CmsKitDbProperties class if you need to change the table prefix or set a schema name (if supported by your database provider).

Connection string

This module uses CmsKit for the connection string name. If you don't define a connection string with this name, it fallbacks to the Default connection string.

See the connection strings documentation for details.

Entity Framework Core

Tables

• CmsTags
• CmsEntityTags

MongoDB

Collections

• CmsTags
• CmsEntityTags