i have implemented the associations in my models
so i have a Parent model that has many Children model
but i need to get a list of Parents that do not have children
Parents that have just 2 children
or Parents that have children whose name is 'James', or 'Sarah', or
or Parents whose children do not have names like 'James', or 'Sarah',
I find it near impossible to use activerecord and the various find
Maybe I overlook something.