helma.org/wiki/HopObject Query Object

Version 5

hannes — Thu, 02 Apr 2009 10:37:55 +0000

Deleted tags

1	<b>Update:</b> this the functionality described in this proposal has been implemented as by HopObject.getCollection() - see Creating Collections programmatically.

Version 4

hannes — Thu, 02 Apr 2009 10:36:39 +0000

1	<b>Update:</b> this functionality has been implemented as HopObject.getCollection() - see Creating Collections programmatically.
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Version 3

hannes — Fri, 21 Sep 2007 10:39:46 +0000

17	type: Page,
22	},

Version 2

hannes — Fri, 21 Sep 2007 10:39:16 +0000

I've been thinking about a query feature that allows to build HopObject collection on the fly. Under the hood, the query object would be a HopObject with a custom DbMapping. The SQL query would probably be built using a subnodeRelation built from properties of the query object's filter property. These filter conditions could cover a number of common comparison operators:

Version 1

hannes — Fri, 21 Sep 2007 10:32:58 +0000

Set tags to helma 1.7

1	I've been thinking about query feature that allows to build HopObject collection on the fly. Under the hood, the query object would be a HopObject with a custom DbMapping. The SQL query would probably be built using a subnodeRelation built from properties of the query object's filter property. These filter conditions could cover a number of common comparison operators:
2
3	* columnname - add equal to clause for the column
4	* columnname_not_equal - add not equal to clause for the column
5	* columnname_less_than - add less than clause for the column
6	* columnname_greater_than - add greater than clause for the column
7	* columnname_less_or_equal - add a less than or equal to clause for the column
8	* columnname_greater_or_equal - add a greater than or equal for the column
9	* columnname_like - add like clause for the column
10	* columnname_not_like - add not like clause for the column
11	* columnname_is_null - add is null clause for the column
12	* columnname_not_null - add is not null clause for the column
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14	Query objects could be created by a constructor or factory function passing the arguments as object literals.
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16	var q = new HopQuery({
17	type: Page
18	filter: {
19	createtime_greater_than: t1,
20	createtime_less_or_equal: t2,
21	type_like: "update:%"
22	}
23	order: "createtime desc"
24	});