How to keep query results after deleting an item? - grails

Question

In my Grails application I have multiple pages that list a group of data objects inside of a table. In these pages I provide a search function which when performed will adjust the table to only display the data objects that match the query. However If a user decides to delete one of these data objects the application will take them back to the default table which displays everything. I would like for query results to remain intact after performing a delete.
I will use my "Skill Evaluations" page as my example in this post.
Here is the relevant code in the domain class
SkillEval.groovy
class SkillEval {
static hasMany = [lines: SkillEvalL, courses: CourseOffering, choiceLabels: ChoiceLabel]
String name
String formVersion
static def search(params) {
def criteria = SkillEval.createCriteria()
def results = criteria.list(params) {
or {
ilike("name", params.search+'%')
}
}
return results
}
}
Relevant section of the gsp view file
list.gsp
<g:form>
<div class="search">
<label for="searchField">Search:</label> <input type="text"
id="searchField" name="search" value="${params.search}" /> <input
type="submit" value="Search" />
</div>
<br>
<table id="mainTable">
<thead>
<tr>
<th>Name</th>
<th>Version</th>
<th>Actions</th>
</tr>
</thead>
<tbody>
<g:each var="eval" in="${skillEvalList}">
<tr>
<td>
<strong>
${eval.name}
</strong>
</td>
<td>
${eval.formVersion}
</td>
<td>
<g:actionSubmit value="Delete" controller="skillEval" action="delete" onclick="setId(${eval.id});return confirm('Are you sure?');" class="delete" />
</td>
</tr>
</g:each>
</tbody>
</table>
<g:if test="${(skillEvalCount/maxCount) > 1}">
<div class="pagination">
<g:paginate action="list" total="${skillEvalCount}" />
</div>
</g:if>
<input id="evalId" type="hidden" name="id" value="" />
</g:form>
</div>
<r:script>
function setId(id)
{
$('#evalId').val(id);
}
</r:script>
Relevant code in the Controller class
SkillEvalController.groovy
def delete(Long id) {
def skillEval = SkillEval.get(id)
if (skillEval) {
def allInstances = SkillEvalI.findAllByForm(skillEval)
allInstances.each { evalInstance ->
evalInstance.lines.clear()
if(!evalInstance.delete()) {
println "Failed to delete skill eval instance"
}
else {
println "Instance successfully deleted."
}
}
try {
skillEval.delete(flush: true)
}
catch (DataIntegrityViolationException e) {
}
}
redirect(action: "list")
}
How can I make the view retain the queried results after deleting one of the queried items?

Answer 1

When you redirect to the list action you can provide parameters -- just capture the parameters (if any) in the delete action and pass them in the redirect call to list at the end of the controller action.
(Update: Forgot that actionSubmit does not accept params as an attribute, so cobbled together this solution from this SO answer and the Grails docs)
Example:
// View (list.gsp)
<g:actionSubmit action="deleteWithParams" value="Delete" ... />
// Controller
def list() {
def deleteWithParams = { forward(action:'delete', params:[search: params?.search]) }
render...
}
def delete(Long id) {
// Deleting the skillEval ...
redirect(action: "list", params: [search: params?.search])
}