Break down Arel::Edge#join_relation into smaller methods
Break down Arel::Edge#join_relation into smaller methods

pxlpnk/rom,dekz/rom,rom-rb/rom,endash/rom,cored/rom,kwando/rom,vrish88/rom,rom-rb/rom,jeremyf/rom,Snuff/rom,rom-rb/rom,pdswan/rom,pvcarrera/rom,dcarral/rom,denyago/rom