Grails can't see database table's content - grails

Question

I'm using Grails version 2.4.4 and postgresql. When I run app, I see error message Cannot get property 'myname' on null object. I know that table is not empty and database connected correctly, because I can upload and see data using scaffolding.
domain class code:
class My_table {
//Integer id
String myname
static constraints = {}
}
Controller code:
class My_tableController {
def index() {
def my_table = My_table.list()
[my_table:my_table]
}
My index.gsp file:
<g:select name="name" from="${my_table}"/><br/>
<label>${my_table.myname} </label><br/>

Answer 1

In the form that I see the error happens in this line: <label>${my_table.myname} </label><br/>.
Here you are calling the property name out of context
<g:select name="name" from="${my_table}"/><br/>
<label>${my_table.myname} </label><br/>
You get an error because my_table is a list of My_table instances and does not have a property named name.
A way to fix this problem could be:
<select name="name">
<g:each in="${my_table}" var="table">
<option value="${table.name}">${table.name}</option>
</g:each>
</select>
Also remember label tags are not valid inside a select, as you can read Permitted content Zero or more <option> or <optgroup> elements. in https://developer.mozilla.org/en-US/docs/Web/HTML/Element/select

Answer 2

Table is a reserved word in most databases. Either change the name of the class and property or map them to something else that is not reserved:
static mapping = {
table 'my_table'
}
Adding the column named table to a table named table is problematic because in the static mapping block a method named table already exists. Newer versions of grails have an ORM mapping block that is more flexible.
static mapping = {
table 'my_table'
table column: 'my_table' // unsure if this would work since it overlaps with the other mapping method
}