wuttaweb.diffs

Tools for displaying simple data diffs

class wuttaweb.diffs.VersionDiff(config, version, **kwargs)

Special diff class for use with version history views. While based on WebDiff, this class uses a different signature for the constructor.

Parameters:

• config – The app config object.

• version – Reference to a Continuum version record object.

• **kwargs – Remaining kwargs are passed as-is to the WebDiff constructor.

render_version_value(version, field, value)

Render the cell value HTML for a given version + field.

This method is used to render both sides of the diff (old + new values). It will just render the field value using a monospace font by default. However:

If the field is involved in a mapper relationship (i.e. it is the “foreign key” to a related table), the logic here will also (try to) traverse that show display text for the related object (if found).

Parameters:

• version – Reference to the Continuum version object.

• field – Name of the field, as string.

• value – Raw value for the field, as obtained from the version object.

Returns:

Rendered cell value as HTML literal

class wuttaweb.diffs.WebDiff(config, old_data: dict, new_data: dict, fields: list = None, nature='update', old_color='#ffebe9', new_color='#dafbe1', cell_padding=None)

Simple diff class for the web app.

This is based on the Diff class; it just tweaks render_html() to use the web template lookup engine.

cell_padding = None

render_html(template='/diff.mako', **kwargs)

Render the diff as HTML table.

Parameters:

• template – Name of template to render, if you need to override the default.

• **kwargs – Remaining kwargs are passed as context to the template renderer.

Returns:

HTML literal string