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Custom jinja Undefined class for handling nested undefined attributes (#51768)

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This commit creates a custom Jinja2 Undefined class that returns
Undefined for any further accesses, rather than raising an exception
This commit is contained in:
Andrew Gaffney
2019-02-12 14:04:00 -06:00
committed by Sam Doran
parent 4e0e09d2de
commit 9c35f18dd6
4 changed files with 60 additions and 2 deletions
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25
test/integration/targets/template/tasks/main.yml
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@@ -642,5 +642,30 @@
register: encoding_1252_diff_result
loop: '{{ template_encoding_1252_encodings }}'
- name: Check that nested undefined values return Undefined
vars:
dict_var:
bar: {}
list_var:
- foo: {}
assert:
that:
- dict_var is defined
- dict_var.bar is defined
- dict_var.bar.baz is not defined
- dict_var.bar.baz | default('DEFAULT') == 'DEFAULT'
- dict_var.bar.baz.abc is not defined
- dict_var.bar.baz.abc | default('DEFAULT') == 'DEFAULT'
- dict_var.baz is not defined
- dict_var.baz.abc is not defined
- dict_var.baz.abc | default('DEFAULT') == 'DEFAULT'
- list_var.0 is defined
- list_var.1 is not defined
- list_var.0.foo is defined
- list_var.0.foo.bar is not defined
- list_var.0.foo.bar | default('DEFAULT') == 'DEFAULT'
- list_var.1.foo is not defined
- list_var.1.foo | default('DEFAULT') == 'DEFAULT'
# aliases file requires root for template tests so this should be safe
- include: backup_test.yml