Odoo 12 Development Essentials - Fourth Edition

Dynamic attributes by expressions – t-att

The t-att- QWeb directive dynamically generates an attribute value by evaluating an expression.

Our Kanban card uses it to dynamically set some attributes on the <img> tag; the title attribute is dynamically rendered using the following:

t-att-title="record.member_id.value"

The  .value field returns its value representation as it should be shown on the screen. For many-to-one fields, this is usually the related record's name value. For users, this is the username. As a result, when hovering the mouse pointer over the image, you will see the corresponding username.

When the expression evaluates to a false equivalent value, the attribute is not rendered at all. This is important for special HTML attributes ...