this.store.findAll is not a function

HI everyone , I am working on tutorials of ember.js and i am currently learning about emberdata. when i try tot replace the my static data by findall(‘rental’) i am getting error which says findall is not at all a function . here are my logs . Thanks

Can you push your files to Github so we can take a look?

What is this.store then? If this is a simple route can you post some code? (gist.github.com, ember-twiddle.com, or codesandbox.io)?