flatMap not detected as part of a lodash chain

[lukeapage]

this

_.chain(a).flatMap('b').map('c').value()

is hitting prefer-lodash-method because flatMap isn't marked chainable.

But am also confused by the lodash documentation - I raised this..
lodash/lodash#2166
because it looks like everything is chainable.. so am not sure whether everything should be chainable or just to add flatMap to the chainable list..

[ganimomer]

The lodash docs are a bit fuzzy on the matter (there's separate docs for _.prototype.flatMap), but it looks like you're right, this is a bug in the plugin.
I tried running _(arr).flatMap() and it returned a wrapper, so it's chainable.

[lukeapage]

Even things the docs say arent possible e.g. join return a wrapper. We will see what jdalton says in a bit anyway..

[ganimomer]

I answered you by myself in the issue. The docs are unclear about _.flatMap, and what you reported here looks like an actual bug, so both issues you opened are valid.

[lukeapage]

So now I understand - it looks to me like there is another bug - the lodash utils exits early if the method is not chainable, without checking to see if its implicit or explicit...

[lukeapage]

here: https://github.com/wix/eslint-plugin-lodash/blob/master/src/util/lodashUtil.js#L94

[ganimomer]

Right again! I'll open a separate issue.