I want to merge the results from the following queries:

```
Dispenser.includes(:reviews).where.not(reviews: { id: nil })

```

and

```
Dispenser.includes(:dispenser_reviews).where.not(dispenser_reviews: { id: nil })

```

I have tried simply placing a `||` in the middle of these two queries, but that does not give the expected result. I want to find all Dispensers with a `review` or a `dispenser_review`.. 

So let's say I have the following dispenser ids from each query:

`[1, 2, 3]` and `[2, 3, 4]` .. 

The output should be the dispensers represented by the ids `[1, 2, 3, 4]`