Has many product categories
Add category to command
gen scaffold command_products
product command
command category
option and example model changes - set associations
nest examples and options
fix error in nested resources (wrong model)
Fix options - part 1
Fix options - part 2
Migration - wrong column
Fix options - part 3
Bad path for edit
Fix options - part 3
Add strong parm
Fix links - parms passed
Fix links - parms passed - part 2
Fix links - parms passed - part 3
Examples - controller changes
Examples - view changes
Examples - fix view  and redirect
Has many product categories
Fix new product link