helma.org/wiki/Collection Mapping

Version 11

anton — Thu, 08 May 2008 19:59:02 +0200

43
44	The Backslash "\" is only necessary when you have a filter that continues in the next line.

anton — Thu, 08 May 2008 18:31:02 +0200

40	tags.filter = ${image_id} = tags2images.images_image_id ANDAND \

anton — Thu, 08 May 2008 18:29:34 +0200

40	tags.filter = ${image_id} = tags2images.images_image_id AND tags2images.tags_tag_id = tags.tag_idAND
41	tags2images.tags_tag_id = tags.tag_id

anton — Thu, 08 May 2008 18:29:07 +0200

22
39	tags = Collection(Tag)
40	tags.filter = ${image_id} = tags2images.images_image_id AND tags2images.tags_tag_id = tags.tag_id
41	tags.filter.additionalTables = tags2images

anton — Thu, 08 May 2008 18:03:46 +0200

anton — Thu, 08 May 2008 18:03:11 +0200

1	<b>Naming conventions</b>
2
3	All the tables and columns in the database are all lowercase. (Which is quite handy with an Mysql database because the names are case-sensitive if the underlying file system is also case-sensitive. So Mysql Names are case sensitive on Linux but not on Windows.)
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5	Tablenames are plural.
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7	Prototype names start with upper case and are camel case. Prototype names are singular.
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9	Property- Object- and Collection-Mapping start with lower case and are also camel case.
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11	Foreign keys are prefixed with the name of the table they are referring to.
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13
4	<b>DB schema</b>
5
8	<b>Mapping</b>
9
17	<b>DB schema</b>
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20
21	<b>Mapping</b>
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anton — Thu, 08 May 2008 17:57:30 +0200

anton — Thu, 08 May 2008 17:57:16 +0200

5	<b>Gallery/type.properties</b>
6	images = Collection(Image)
7	images.local = gallery_id
8	images.foreign = galleries_gallery_id
7
12	<b>Image/type.properties</b>
13

anton — Thu, 08 May 2008 17:36:08 +0200

3	test<% this.image name="1-to-n-relation.jpg" %>
8	test<% this.image name="m-to-n-relation.jpg" %>
9

anton — Thu, 08 May 2008 17:34:11 +0200

anton — Thu, 08 May 2008 17:23:18 +0200

test