getStartOfMonth is not a function error

[bawpcwpn]

Hi!

Trying to use this with react-admin 2.7.1 and when using a I get the following error when clicking on the field:

TypeError: _this.props.utils.getStartOfMonth is not a function

The versions for my other packages are:
"@date-io/date-fns": "^1.1.0",
"date-fns": "^2.0.0-alpha.27",

If I can provide any other info, please let me know!

[cmf2903]

Solved it by adding below line after importing the utils import DateFnsUtils from '@date-io/date-fns'

DateFnsUtils.prototype.getStartOfMonth = DateFnsUtils.prototype.startOfMonth

Ref: mui/material-ui-pickers#877 (comment)

And when getting an error related to awareOfUnicodeTokens need to set to true, need change the format from DD and YYYY to dd and yyyy respectively.

Ref: https://blog.date-fns.org/post/unicode-tokens-in-date-fns-v2-sreatyki91jg