Creating a view with Domain object fields - grails

Question

I have the following domain classes.
Address
String number
String roadName
String country
Person
String fName
String age
Address address
I have a view called PersonViewSave i want the user to be able to save Person information from this view. When creating a Person record the user needs to create a Address record as well.
My Person controller looks like this:
PersonViewSave ={
def ad = new Address(number: '11', roadName: 'round road', country:'France').save()
new Person(fName: 'Alex', age: '23', address:ad).save()
}
1.) How do i collect parameters from the view and bring it to the PersonViewSave method ? (And can someone show me a sample GSP view file with the Person and Address textfields)
2.) Incase if there's an error in the Address created, how do i prevent creating a Person object with an address as shown in this line new Person(fName: 'Alex', age: '23', address:ad).save()
UPDATE
<g:form name="myForm" method="post" action="doIt">
<p>Person info:</p>
<label for="firstName">First Name</label>
<g:textField name="firstName" id="firstName" />
<p>Address Info:</p>
<label for="roadName">Street Number</label>
<g:textField name="roadName" id="roadName" />
<g:submitButton name="submit" value="Submit" />
Here, i have only used few objects from the Domain classes just to see if it works.
I also have a parameter called createdDate in both Domain classes. That as well needs to be auto inserted.
My Service Class is as follows:
def saveService () {
def ad = new Address(params)
if (ad.save(flush: true)) {
def p = new Person(params)
p.address = ad
p.save()
} else {
// display validation errors
}
}
1.) I get an error and it is > No such property: params for class: pro.PersonService
2.) What hapence i have 2 domain class with parameters that has the same Name. For example Animal and Person domain classes have an parameter called firstName. According to your previous solution how will grail distinguish to what domain class it belongs to ?
I am using Grails 2.2.4

Answer 1

Here is a way to check that the Address saved correctly:
def ad = new Address(params)
if (ad.save(flush: true)) {
def p = new Person(params)
p.address = ad
p.save()
} else {
// display validation errors
}
This returns the Address if it saved properly, which results in true, otherwise it returns null (or false).
Also, you can use data binding via the params map to create your objects from parameters. As long as the key in params matches up to a property name in your Address and Person class, the value of the parameter will be assigned to the object.
So, for instance, to map your Person, you will need fields like the following:
<g:form name="personForm" method="post" action="PersonViewSave">
<p>Person info:</p>
<label for="fName">First Name</label>
<g:textField name="fName" id="fName" />
<label for="age">Age</label>
<g:textField name="age" id="age" />
<p>Address Info:</p>
<label for="number">Street Number</label>
<g:textField name="number" id="number" />
<label for="roadName">Road</label>
<g:textField name="roadName" id="roadName" />
<label for="country">Country</label>
<g:textField name="country" id="country" />
<g:submitButton name="submit" value="Submit" />
</g:form>

Answer 2

you can try this
def ad = new Address(number:params.number , roadName:params.roadName , country: params.country)
if (ad.save(flush: true)) {
def p = new Person(fName:params.fName , age: params.age, address:ad)
p.save()
} else {
// display validation errors
}