class QueryTable (Plugin):
- # set checkboxes if a final column with checkboxes is desired
- # pass columns as the initial set of columns
- # if None then this is taken from the query's fields
- # also please refrain from passing an 'aoColumns' as datatables_options
- # as we use 'aoColumnDefs' instead
+ """A plugin for displaying a query as a list
+
+More accurately, we consider a subject entity (say, a slice)
+that can be linked to any number of related entities (say, resources, or users)
+The 'query' argument will correspond to the subject, while
+'query_all' will fetch the complete list of
+possible candidates for the relationship.
+
+Current implementation makes the following assumptions
+* query will only retrieve for the related items a list of fields
+ that corresponds to the initial set of fields displayed in the table
+* query_all on the contrary is expected to return the complete set of
+ available attributes that may be of interest, so that using a QueryEditor
+ one can easily extend this table without having to query the backend
+* checkboxes is a boolean flag, set to true if a rightmost column
+ with checkboxes is desired
+* optionally pass columns as the initial set of columns
+ if None then this is taken from the query's fields
+* id_key is the name of a column used internally in the plugin
+ for checkboxes management. Caller should specify a column that is present
+ in the fields returned by 'query' and that has unique values.
+ If not specified, metadata will be used to find out a primary key.
+ However in the case of nodes & slice for example, the default key
+ as returned by the metadata would be 'urn', but it is not necessarily
+ a good idea to show urn's initially - if at all.
+ This is why a slice view would use 'hrn' here instead.
+* datatables_options are passed to dataTables as-is;
+ however please refrain from passing an 'aoColumns'
+ as we use 'aoColumnDefs' instead.
+"""
+
def __init__ (self, query=None, query_all=None,
checkboxes=False, columns=None,
+ id_key=None,
datatables_options={}, **settings):
Plugin.__init__ (self, **settings)
self.query = query
else:
self.columns = []
self.hidden_columns = []
+ self.id_key=id_key
self.datatables_options=datatables_options
# if checkboxes were required, we tell datatables about this column's type
# so that sorting can take place on a selected-first basis (or -last of course)
return ['plugin_uuid', 'domid',
'query_uuid', 'query_all_uuid',
'checkboxes', 'datatables_options',
- 'hidden_columns']
+ 'hidden_columns', 'id_key',]