Fix GET return no error when key type is not string

[jihuayu]

fixed #1969

[sonarcloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[git-hulk]

@jihuayu Could you add a test case to make sure this issue was resolved?

[jihuayu]

@git-hulk No problem, I will add test cases for each type.

[git-hulk]

@git-hulk No problem, I will add test cases for each type.

Thank you!

[git-hulk]

@jihuayu This bug should be resolved after #1971, but can add test cases to make sure it works well if you like.

[jihuayu]

@git-hulk All right, I'm a bit busy these days, I will come back later to solve it.

[jihuayu]

Many commands have this kind of constraint (cannot operate on keys of other types), and we may need a universal method to test them.
I will find a better way that covers this issue.
Close this PR.