validate function run on DataFrameSchema w/ lazy=true doesn't report all violations on non nullable column

[alex-tully]

Describe the bug
When a column is set to non-nullable and a nullable value is supplied in the data frame then no further validations are executed for that column and all failure cases are not reported for that column. I am hoping you'll tell me that I am doing something wrong 😃

• I have checked that this issue has not already been reported.
• I have confirmed this bug exists on the latest version of pandera.
• (optional) I have confirmed this bug exists on the master branch of pandera.

Code Sample

import pandas as pd
import pandera as pa
column = pa.Column(pa.String, name="id", nullable=False, required=True, allow_duplicates=False)
column.checks.append(pa.Check.str_matches(r"^ID[\d]{3}$"))
#column.has_subcomponents = True - should i switch this on?
schema = pa.DataFrameSchema({
     "id": column
})
data = ["ID001", None, "XXX"]
df = pd.DataFrame(data, columns=["id"])
try:
    schema.validate(df, lazy=True)
except pa.errors.SchemaErrors as exc:
    print(exc.failure_cases)

Output

	schema_context	column	check	check_number	failure_case	index
0	Column	id	non_nullable	None	None	1

Expected behavior

I would expect all validations to be performed and failure cases to be reported, in this case i would expect the output to be

	schema_context	column	check	check_number	failure_case	index
0	Column	id	non_nullable	None	None	1
1	Column	id	str_matches(...)	...	XXX	2

Desktop (please complete the following information):

• OS: Amazon Linux 2
  • CPE OS Name: cpe:2.3:o:amazon:amazon_linux:2
  • Kernel: Linux 4.14.232-177.418.amzn2.x86_64
• Version 0.6.4

Additional context

I have done some digging and have found this issue and #528 that offers a fix. This doesn't resolve the nullable issue (i don't think).

In schemas.py the nullable check is here and the error handler is initialized here it appears that the lazy parameter that is passed in here only comes as None unless has_subcomponents is true which has been removed in the latest dev branch.

[cosmicBboy]

fixed by #550

[alex-tully]

@cosmicBboy thanks for fixing, do you know when this will be released?

[cosmicBboy]

Should be by end of this week!

…

On Mon, Jul 12, 2021 at 10:38 AM alex-tully ***@***.***> wrote: @cosmicBboy <https://github.com/cosmicBboy> thanks for fixing, do you know when this will be released? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#532 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAVPVMPIGK43PSKYRHIP3WTTXL47XANCNFSM47OUB5DA> .