selection from no ref back to normal relationship

Nested Selection from fully ref to no ref and back to full ref

In this example we have :

continent -< hasMany Countries [ Countries has belongsTo continent:continet ]
countries -< hasMany Cities [ Cities has belongsTo country:country ]
Cities -< hasMany Boroughs - [ Boroughs has belongsTo cities ]

Boroughs -< hasMany Streets [ Streets belongsTo boroughs:boroughs]

Try Europe United Kingdom and London and Camden

<form method=post action=example5>
<g:selectPrimary id="MyContinent2" name="MyContinent2"
    domain='ajaxdependancyselectexample.MyContinent'
    searchField='continentName'
    collectField='id'
   
    domain2='ajaxdependancyselectexample.MyCountry'
    bindid="mycontinent.id"
    searchField2='countryName'
    collectField2='id'
    noSelection="['': 'Please choose Continent']"
    setId="MyCountry11"
    value=''/>

<g:selectSecondary id="MyCountry11" name="MyCountry11"
    domain2='ajaxdependancyselectexample.MyCity'
    bindid="mycountry.id"
    searchField2='cityName'
    collectField2='id'

    noSelection="['': 'Please choose Continent']"
    setId="MyCity11"
    value=''/>

<g:selectSecondaryNR id="MyCity11" name="MyCity11"
	domain='ajaxdependancyselectexample.MyCity'
    bindid="myborough"
	searchField='cityName'
    collectField='id'
    
    domain2='ajaxdependancyselectexample.MyBorough'
     searchField2='actualName'
    collectField2='id'
     
    noSelection="['': 'Please choose City']"
    setId="MyBorough11"
    value=''/>


<br>
<g:selectSecondary id="MyBorough11" name="MyBorough11"
    domain2='ajaxdependancyselectexample.Streets'
    bindid="localborough.id"
    searchField2='streetName'
    collectField2='id'
   
    noSelection="['': 'Please choose Borough']"
    setId="MyRoad22"
    value=''/>
    
     <g:select name="MyRoad22" id="MyRoad22"  
    optionKey="id" optionValue="name" 
    from="[]" required="required" noSelection="['': 'Please choose Borough']" />
    
    
    
   
<br> <input type=submit value=go> </form>