How will you map the permission control between two entities? I have the following entities: Producer, Consumer. 

A Producer produces Food for the Consumer. 
A Consumer consumes Food produced by the Producer. 


Now I am tasked to design a schema which maps which consumers can eat food produced by each producer. 

As an example, I have Producers p1, p2, p3 and Consumers c1, c2, c3. 

   c1  c2  c3
p1  N   Y   N
p2  Y   N   N
p3  N   N   Y

where N = No and Y = Yes


Keep in mind that


the number of consumers and producers will keep growing. 
the default state of whether a consumer can eat food from a new producer is No


How should I define this schema?
One approach I thought of is to create a table 

producer_consumer_allowed (producer_id, consumer_id). 

A consumer is allowed to consume food from a producer if an entry for both this producer and consumer exist in this table. 

Whenever we add a new producer, we do not need to do anything since the default state of consumers-producers is No. 

Whenever we add consumers, we also do not need to add entires into this table since the default state is also No.