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Update docs for Q objects and new operator

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desile 2017-11-30 00:21:59 +03:00
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docs/querysets.md
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@ -26,6 +26,12 @@ It is possible to specify several fields to filter or exclude by:
>>> qs.conditions_as_sql() >>> qs.conditions_as_sql()
u"last_name = 'Smith' AND height > 1.75" u"last_name = 'Smith' AND height > 1.75"
For filters with compound conditions you can use `Q` objects inside `filter` with overloaded operators `&` (AND), `|` (OR) and `~` (NOT):
>>> qs = Person.objects_in(database).filter((Q(first_name='Ciaran', last_name='Carver') | Q(height_lte=1.8)) & ~Q(first_name='David'))
>>> qs.conditions_as_sql()
u"((first_name = 'Ciaran' AND last_name = 'Carver') OR height <= 1.8) AND (NOT (first_name = 'David'))"
There are different operators that can be used, by passing `<fieldname>__<operator>=<value>` (two underscores separate the field name from the operator). In case no operator is given, `eq` is used by default. Below are all the supported operators. There are different operators that can be used, by passing `<fieldname>__<operator>=<value>` (two underscores separate the field name from the operator). In case no operator is given, `eq` is used by default. Below are all the supported operators.
| Operator | Equivalent SQL | Comments | | Operator | Equivalent SQL | Comments |
@ -36,6 +42,7 @@ There are different operators that can be used, by passing `<fieldname>__<operat
| `gte` | `field >= value` | | | `gte` | `field >= value` | |
| `lt` | `field < value` | | | `lt` | `field < value` | |
| `lte` | `field <= value` | | | `lte` | `field <= value` | |
| `between` | `field BETWEEN value1 AND value2` | |
| `in` | `field IN (values)` | See below | | `in` | `field IN (values)` | See below |
| `not_in` | `field NOT IN (values)` | See below | | `not_in` | `field NOT IN (values)` | See below |
| `contains` | `field LIKE '%value%'` | For string fields only | | `contains` | `field LIKE '%value%'` | For string fields only |