id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,pull_request,body,repo,type,active_lock_reason,performed_via_github_app,reactions,draft,state_reason
729818242,MDExOlB1bGxSZXF1ZXN0NTEwMjM1OTA5,189,Allow iterables other than Lists in m2m records,35681,closed,0,,,3,2020-10-26T18:47:44Z,2020-10-27T16:28:37Z,2020-10-27T16:24:21Z,CONTRIBUTOR,simonw/sqlite-utils/pulls/189,"I was playing around with sqlite-utils, creating a Roam Research dogsheep-style importer for Datasette, and ran into a slight snag.

I wanted to use a generator to add an order column in an importer. It looked something like:

```
def order_generator(iterable, attr=None):
    if attr is None:
        attr = ""order""
    order: int = 0

    for i in iterable:
        i[attr] = order
        order += 1
        yield i
```

When I used this with `insert_all` and other things, it worked fine--but it didn't work as the `records` argument to `m2m`.  I dug into it, and sqlite-utils is explicitly checking if the records argument is a list or a tuple.  I flipped the check upside down, and now it checks if the argument is a mapping.  If it's a mapping, it wraps it in a list, otherwise it leaves it alone.

(I get that it might not really make sense to put the order column on the second table.  I changed my import schema a bit, and no longer have a real example, but maybe this change still makes sense.)

The automated tests still pass, but I did not add any new ones.

Let me know what you think! I'm really loving Datasette and its ecosystem; thanks for everything!",140912432,pull,,,"{""url"": ""https://api.github.com/repos/simonw/sqlite-utils/issues/189/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",0,