When using the 'modelSelector' setting, buildSelector returns circular selector.

[ka-miyake]

This filter works.

filter = { where:
  { foo: 'foo' }
};
model.find(filter, (err, rslt) => { /* ... */ }); 

But this doesn't.

filter = { where: { and: [
  { foo: 'foo' },
  { bar: 'bar' }
]}};
model.find(filter, (err, rslt) => { /* ... */ }); 

[jannyHou]

hmm, it works for me:
Use example https://github.com/strongloop/loopback-example-database
Add another property in model Account called branch
With some sample data(see reference), try node . and open explorer:

Endpoint GET/ Account with filter

{"where": {"and": [{"email": "email1"}, {"branch": "branch1"}]}}

Result:

[
  {
    "email": "email1",
    "branch": "branch1",
    "id": "93f63326e1bbe187e10d873620377013"
  },
  {
    "email": "email1",
    "branch": "branch1",
    "id": "93f63326e1bbe187e10d873620376e5b"
  },
  {
    "email": "email1",
    "branch": "branch1",
    "id": "48eb5295643f29caeae9009d2b3719f4"
  }
]

Reference:

[
  {
    "email": "email2",
    "branch": "branch2",
    "id": "c4f513eceaa8647d85fcb99b64294d68"
  },
  {
    "email": "email1",
    "branch": "branch1",
    "id": "93f63326e1bbe187e10d873620377013"
  },
  {
    "email": "email1",
    "branch": "branch1",
    "id": "93f63326e1bbe187e10d873620376e5b"
  },
  {
    "email": "email1",
    "branch": "branch2",
    "id": "bf769780771cbff99efae668242cf8ec"
  },
  {
    "email": "email1",
    "branch": "branch1",
    "id": "48eb5295643f29caeae9009d2b3719f4"
  }
]

[jannyHou]

@ka-miyake It works for me, see my comment in #49 (comment)
If you still run into this issue, please fork https://github.com/strongloop/loopback-sandbox and provide your app to reproduce the error.

I am closing it now, feel free to reopen it with the sandbox. Thanks.