Pass record/value to LinkColumn's attrs callables too (jieter#852)

django_tables2/columns/base.py

@@ -77,6 +77,11 @@ def __init__(self, url=None, accessor=None, attrs=None, reverse_args=None):
             accessor (Accessor): if supplied, the accessor will be used to decide on which object
                 ``get_absolute_url()`` is called.
             attrs (dict): Customize attributes for the ``<a>`` tag.
+                Values of the dict can be either static text or a
+                callable. The callable can optionally declare any subset
+                of the following keyword arguments: value, record, column,
+                bound_column, bound_row, table. These arguments will then
+                be passed automatically.
             reverse_args (dict, tuple): Arguments to ``django.urls.reverse()``. If dict, the arguments
                 are assumed to be keyword arguments to ``reverse()``, if tuple, a ``(viewname, args)``
                 or ``(viewname, kwargs)``
@@ -143,7 +148,7 @@ def resolve_if_accessor(val):
         return reverse(**params)
 
     def get_attrs(self, **kwargs):
-        attrs = AttributeDict(self.attrs or {})
+        attrs = AttributeDict(computed_values(self.attrs or {}, kwargs=kwargs))
         attrs["href"] = self.compose_url(**kwargs)
 
         return attrs

tests/columns/test_linkcolumn.py

@@ -123,19 +123,22 @@ class PersonTable(tables.Table):
 
     def test_a_attrs_should_be_supported(self):
         class TestTable(tables.Table):
-            col = tables.LinkColumn(
-                "occupation", kwargs={"pk": A("col")}, attrs={"a": {"title": "Occupation Title"}}
-            )
+            attrs = {"a": {"title": "Occupation Title", "id": lambda record: str(record["id"])}}
+            col = tables.LinkColumn("occupation", kwargs={"pk": A("col")}, attrs=attrs)
             col_linkify = tables.Column(
                 accessor="col",
-                attrs={"a": {"title": "Occupation Title"}},
+                attrs=attrs,
                 linkify=("occupation", {"pk": A("col")}),
             )
 
-        table = TestTable([{"col": 0}])
+        table = TestTable([{"col": 0, "id": 1}])
         self.assertEqual(
             attrs(table.rows[0].get_cell("col")),
-            {"href": reverse("occupation", kwargs={"pk": 0}), "title": "Occupation Title"},
+            {
+                "href": reverse("occupation", kwargs={"pk": 0}),
+                "title": "Occupation Title",
+                "id": "1",
+            },
         )
         self.assertEqual(table.rows[0].get_cell("col"), table.rows[0].get_cell("col_linkify"))