In OpenERP, you may need to create custom filters for frequently used filters like Today's sales, Today's collections etc.

Here are the steps to create such custom filters.

Go to Settings > Technical > User Interface > User Defined Filters

This should show you list of all custom filters that are created so far.

• Click on Create to create new Custom Filter
• Provide Filter name
• Make User field blank (so that this filter is available to all users)
• In the model field select the model for which this Customer filter should be available
• In the Domain field specify the Domain which is the filter condition

Below are couple of examples:

Today's sales

• Model = Sales Order
• Domain = 

  [
  ['date_order', '>=', context_today().strftime('%Y-%m-%d')],
  ['date_order', '<', (context_today() + datetime.timedelta(1)).strftime('%Y-%m-%d')],
  ]

• Context = {}

Today's collections

• Model = Accounting Voucher
• Domain = [['date', '=', context_today().strftime('%Y-%m-%d')], ['journal_id', 'ilike', 'CASH']]
• Context = {}

Products Not Sold in Past 30 days

• Model = Products report by last moved
• Domain =[['last_moved_date', '<', (context_today() - datetime.timedelta(30)).strftime('%Y-%m-%d')]]
• Context = {}

The above filter can be modified for any 'n' number of days