Putting the List in a Map is a good wayt to be able to specify a property.
If you want to use the list directly, I'd try specifying the property in
iterate.
<select id="myObject.dynamicQuery" resultMap="myObject_resultmap"
resultClass="java.util.List">
select id, name, data, notes
from objectTable
<dynamic prepend="where">
<iterate property="" conjunction="and">
$[].condition$ $[].operator$ #[].value#
</iterate>
</dynamic>
</select>
Christian
-----Original Message-----
From: Todd Wilkinson [mailto:[EMAIL PROTECTED]
Sent: Wednesday, July 09, 2008 9:56 AM
To: [email protected]
Subject: RE: Problem iterating over a list of beans
Hi-
Thanks for the tip. I tried that and it didn't work.
The only way I was able to get this to work was to wrap it in a class that had
a property that was a list. Seems kind of kludgey - but it works nonetheless.
> I'm certainly not an expert at this, but what if instead of passing
> the list right into the query, you created a map and put the list into
> the map with the key "conditions" (then pass the map into the query).
>
> Then, put something like this in the mapping:
>
> <iterate property="conditions" conjunction="and">
> $conditions[].condition$ $conditions[].operator$ #[].value#
> </iterate>
>
> That is usually how I iterate over stuff. Not sure if I am
> understanding entirely what is going on with your situation, though...
>
> Chris
>
> -----Original Message-----
> From: Todd Wilkinson [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, July 08, 2008 3:53 PM
> To: [email protected]
> Subject: Problem iterating over a list of beans
>
>
> Hello-
> I'm new to iBATIS and I'm having trouble with the <iterate> element.
>
> I want to create a query for an entirely dynamic where clause. I've
> constructed a Bean called QueryCondition with the following properties:
>
> String condition
> String operator
> String value
>
> (along with public accessors and mutators)
>
> I'm passing an ArrayList into the following mapping:
>
> <select id="myObject.dynamicQuery" resultMap="myObject_resultmap"
> resultClass="java.util.List">
> select id, name, data, notes
> from objectTable
> <dynamic prepend="where">
> <iterate conjunction="and">
> $[].condition$ $[].operator$ #[].value#
> </iterate>
> </dynamic>
> </select>
>
> But it's not working. In the logs, I see the following:
> Preparing Statement: select id, name, source_code_location, context,
> notes from objectTable where [EMAIL PROTECTED]
> [EMAIL PROTECTED] ?
>
> and then I get a logged exception:
> 0com.ibatis.common.jdbc.exception.NestedSQLException:
> --- The error occurred while applying a parameter map.
> --- Check the sites.dynamicQuery-InlineParameterMap.
> --- Check the parameter mapping for the '[0].value' property.
> --- Cause: java.lang.NullPointerException [full stack trace available
> if needed] The line 'check the parameter mapping...' will occur for
> whichever one of the properties a place in hashmarks, ie -
> #[].operator# will cause it also.
>
> I have verified that there is 1 QueryCondition object in this list
> which has its properties set. Strange that the prepared statement
> resolves the first two properties to objects of type QueryCondition,
> instead of property string valyes. I guess I'm not understanding how
> to properly access the objects in the list. If I set a 'property'
> attribute in the <iterate> tag, I get:
> --- The error occurred while preparing the mapped statement for execution.
> --- Check the myObject.dynamicQuery.
> --- Check the parameter map.
> --- Cause: com.ibatis.common.beans.ProbeException: Error getting
> ordinal list from JavaBean. Cause java.lang.StringIndexOutOfBoundsException:
> String index out of range: -1
>
> Thanks for any help!
>
> No virus found in this incoming message.
> Checked by AVG.
> Version: 8.0.136 / Virus Database: 270.4.6/1540 - Release Date:
> 7/8/2008
> 6:33 AM
>
>
