CODEWITHSUNDEEP
grails
Motilal
Motilal

Reputation: 276

how to update multiple instances of a same domain object in grails in single 'submit'?

I have a table of data, some thing like below

Id     Name       LastName
1      John       Doe
2      Jane       Roi
3      Jerry      amol
4      Jeff       Jels


'SAVE' 'CANCEL'

all the above rows are editable, i can edit all the 4 rows (id, name, lastname) and hit 'SAVE' button. The challenge here is i have pass all 4 rows values to controller and validate each filed, if any errors have to send the error back to view against each row, if fine then update in database. How to achieve this? please help me

Here is my view:

<table id='show_brands_table'>
<tbody>
    <g:each in="${brandsList}" status="i" var="brands">         
        <tr id="tr_brand_${brands.id}" class="${(i % 2) == 0 ? 'even' : 'odd'}">
            <td>
                <input type="text" id="brand_${brands.id}"  value="${brands.brand}" class="${(i % 2) == 0 ? 'even' : 'odd'}"></input>
            </td>
            <td>
                <input type="text" id="brandID_${brands.id}" value="${brands.bpBrandId}" class="${(i % 2) == 0 ? 'even' : 'odd'}"></input>
            </td>
            <td>
            <g:select id="weight${id}" name="weight${id}"from="${}"value="${weight}" onchange="modify();" />                                            
            </td>
        </tr>           
    </g:each>
</tbody>

Upvotes: 3

Views: 1651

Answers (1)

ataylor
ataylor

Reputation: 66059

Grails can bind form results to multiple objects. Use a prefix followed by a dot for form element names to distinguish the individual objects. Example:

<g:each in="${brandsList}" status="i" var="brand">       
  <input type="text" name="brand_${brand.id}.name" value="${brand.name}">
  <input type="text" name="brand_${brand.id}.weight" value="${brand.weight}">
  ...
</g:each>

In your controller, you'll have to loop over the params and find out how many objects have been submitted. You can look for the prefix as a param, and then use it as a name space:

def update() {
    for (name in params.keySet()) {
        def match = name =~ /^brand_(\d+)$/
        if (match) {
            def id = m[0][1] as long
            def brand = Brand.get(id)
            brand.properties['name', 'weight'] = params[name]
            brand.save()
        }
    }
}

See the Grails Data Binding section in the manual for more information.

Upvotes: 2

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