alfresco-ng2-components/docs/content-services/content-metadata.component.md

Title, Added, Status, Last reviewed

Title	Added	Status	Last reviewed
Content Metadata Card component	v2.1.0	Active	2019-01-16

Content Metadata Card component

Displays and edits metadata related to a node.

Basic Usage

<adf-content-metadata-card
    [displayEmpty]="false"
    [toggleDisplayProperties]="displayDefaultProperties"
    [preset]="'*'"
    [node]="node">
</adf-content-metadata-card>

Class members

Properties

Name	Type	Default value	Description
displayDefaultProperties	boolean	true	Toggles whether the metadata properties should be shown
displayEmpty	boolean	false	Toggles whether to display empty values in the card view
editable	boolean	false	Toggles whether the edit button should be shown
expanded	boolean	false	Toggles between expanded (ie, full information) and collapsed (ie, reduced information) in the display
multi	boolean	false	The multi parameter of the underlying material expansion panel, set to true to allow multi accordion to be expanded at the same time
node	Node		(required) The node entity to fetch metadata about
preset	string		Name of the metadata preset, which defines aspects and their properties

Details

The component shows metadata related to a given node. It uses the Card View component to render the properties of metadata aspects. The different aspects and their properties to be shown can be configured as application config presets (see below). By default the component only shows the basic properties of the node. The user can click on the pencil icon at the bottom of the component to edit the metadata properties.

Application config presets

You can define different presets for the metadata component or override the default presets in the app.config.json file. The default preset is "*" if not set, meaning the component will display every aspect and property of a node without filtering.

You can define as many extra presets as you need for your components.

The example configurations below show the options in detail.

Indifferent config

The default configuration behaves like the following:

...
"content-metadata": {
    "presets": {
        "default": "*"
    }
}
...

Aspect oriented config

With this type of configuration you can "whitelist" aspects and properties for a preset, but everything will be grouped by aspects and there is no further way to group properties. Use a layout oriented configuration if you want to define your own custom groups.

The default configuration shows every aspect but you can restrict it to just a small selection of aspects by "whitelisting" the ones you want in the default section. In the example below, just the exif:exif and custom:aspect aspects are whitelisted:

...
"content-metadata": {
    "presets": {
        "default": {
            "custom:aspect": "*",
            "exif:exif": "*"
        }
    }
}
...

You can further restrict the whitelist to specific properties of one or more aspects by using an array of property names in place of the "*" filter:

...
"content-metadata": {
    "presets": {
        "default": {
            "custom:aspect": "*",
            "exif:exif": [ "exif:pixelXDimension", "exif:pixelYDimension"]
        }
    }
}
...

A final example shows the same process applied to a custom preset called "kitten-images":

...
"content-metadata": {
    "presets": {
        "default": "*",
        "kitten-images": {
            "custom:aspect": "*",
            "exif:exif": [ "exif:pixelXDimension", "exif:pixelYDimension"]
        }
    }
}
...

Layout oriented config

You can also go beyond the aspect oriented configuration if you need to configure the groups and properties in a more detailed way. With this type of configuration any property of any aspect/type can be "cherry picked" and grouped into an accordion drawer, along with a translatable title defined in the preset configuration.

Basic elements

The following config will produce one accordion group named "TRANSLATABLE_TITLE_FOR_GROUP_1", with all the properties from custom:aspect followed by the two properties (exif:pixelXDimension and exif:pixelYDimension) from the exif:exif aspect and then one property (custom:myPropertyName) from custom:type:

...
"content-metadata": {
    "presets": {
        "kitten-images": [{
            "title": "TRANSLATABLE_TITLE_FOR_GROUP_1",
            "items": [
                { "aspect": "custom:aspect", "properties": "*" },
                { "aspect": "exif:exif", "properties": [ "exif:pixelXDimension", "exif:pixelYDimension"] },
                { "type": "custom:type", "properties": [ "custom:myPropertyName" ] },
            ] 
        }]
    }
}
...

More complex example

A more complex config is shown in the example below:

  "content-metadata": {
    "presets": {
      "kittens": [
      {
        "title": "GROUP-TITLE1-TRANSLATION-KEY",
        "items": [
          { 
            "aspect": "exif:exif",
            "properties": "*"
          },
          { 
            "aspect": "kitten:vet-records", 
            "properties": [ "kitten:custom1", "kitten:custom3" ]
          },
          { 
            "aspect": "owner:parameters", 
            "properties": [ "owner:name" ]
          },
          { 
            "type": "kitten:kitten", 
            "properties": [ "kitten:name", "kitten:color" ]
          }
        ]
      },
      {
        "title": "GROUP-TITLE2-TRANSLATION-KEY",
        "items": [
          {
            "aspect": "kitten:food", 
            "properties": [ "kitten:favourite-food", "kitten:recommended-food" ] 
          }
        ]
      }
    ]
  }

The result of this config would be two accordion groups with the following properties:

GROUP-TITLE1-TRANSLATION-KEY
exif:param1
exif:param2
...
exif:paramN
kitten:custom1
kitten:custom3
owner:name
kitten:name
kitten:color

GROUP-TITLE2-TRANSLATION-KEY
kitten:favourite-food
kitten:recommended-food

What happens when there is a whitelisted aspect in the config but the given node doesn't relate to that aspect

Nothing - since this aspect is not related to the node, it will simply be ignored and not displayed. The aspects to be displayed are calculated as an intersection of the preset's aspects and the aspects related to the node.