Layer configuration

These settings are in Layer properties.

QGIS Server tab

In Layer Properties ‣ QGIS Server, you can set different settings for QGIS Server :

  • Short name is a machine readable name for the layer.

  • dataUrl is the URL to a HTML or PDF presenting the data. It can be a link to the open data portal webpage.

If the link is empty in Lizmap ‣ Layers dialog, the link in Lizmap will be automatically populated by the Lizmap plugin from set in this tab.

You can use the refresh_svg button in Lizmap to pick this value.

Add a alias on a field

Usually, the field names are defined without accent, spaces and can’t be very long. In Layer Properties ‣ Attributes Form and clicking on a field, you can add an alias.

This will be used to substitute the field name when possible for a more friendly name.

Layer Properties ‣ Source Fields, you can the list of alias defined on the layer.

Customize the edition form

In Layer Properties ‣ Attributes Form and clicking on a field, you can setup the form.

To set the editing tools for your layer fields:

  • In Layer properties ‣ Attributes Form.

  • By selecting first a field on left panel, select the Widget type:

    • To hide a field, choose Hidden. The user will not see the field in the form. There will be no content inserting. Use it for the primary key.

    • To add a read-only field, unchecked Editable checkbox.

    • Special case of the option Value Relation. You can use this option for a Lizmap map.

      For users to have access to information of the outer layer that contains the data, you must enable the publication of the layer as a WFS layer in Project properties ‣ QGIS Server ‣ WFS.


Lizmap Web Client does not know the “QT Designer UI file” for form generation. Therefore only use the Autogenerate mode or Drag and drop mode for editing layers.


To make the field compulsory you have to define it as NOT NULL in the properties of the table, in the database, not in QGIS –> Layer Properties.


All the editing tools are not yet managed by Lizmap Web Client. Only the following tools are supported:

  • Text edit

  • Classification

  • Range

  • Value Map

  • Hidden

  • Check Box

  • Date/Time

  • Value Relation

  • Relation Reference

If the tool is not supported, the web form displays a text input field.

Advanced form

Lizmap can reproduce several behavior configured in QGIS :

  • Control visibility by expression. For example, you can toggle tab’s visibility based on a checkbox state.

    For that, we can create a field named has_photo defined as a Checkbox and a photo tab having Control Visibility by Expression checked and "has_photo" = true OR "has_photo" = 't' as Expression.

  • Constraints defined by expression.

    For example, you want to simply assert users correctly type a website URL beginning by http (of course, regex would be better but we keep it simple).

    For that, we can create a field named website defined as a Text Edit, define Constraints with left( "website", 4) = 'http' as expression and Web site URL must start with 'http' as Expression description.

  • Filter expression for a Value Relation field.

    For example, you want a field to automatically get the related value from another layer’s field when drawing a point on the map. For that, we can create a field name quartier defined as a Value Relation to a quartiers layer and set intersects($geometry, @current_geometry) as Filter expression. We can also check Not null and Enforce not null contraint to assert no NULL value can be set.

Server side simplification

For PostGIS layers, you can enable server side simplification. This in Layer properties ‣ Rendering for each layers. You can change the default behavior for next new layer in QGIS General properties ‣ Rendering.