Has - yq

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Has

This is operation that returns true if the key exists in a map (or index in an array), false otherwise.
Note that versions prior to 4.18 require the 'eval/e' command to be specified.
yq e <exp> <file>
Has map key
Given a sample.yml file of:
1
- a: yes
2
- a: ~
3
- a:
4
- b: nope
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then
1
yq '.[] | has("a")' sample.yml
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will output
1
true
2
true
3
true
4
false
Copied!
Select, checking for existence of deep paths
Simply pipe in parent expressions into has
Given a sample.yml file of:
1
- a:
2
    b:
3
      c: cat
4
- a:
5
    b:
6
      d: dog
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then
1
yq '.[] | select(.a.b | has("c"))' sample.yml
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will output
1
a:
2
  b:
3
    c: cat
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Has array index
Given a sample.yml file of:
1
- []
2
- [1]
3
- [1, 2]
4
- [1, null]
5
- [1, 2, 3]
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then
1
yq '.[] | has(1)' sample.yml
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will output
1
false
2
false
3
true
4
true
5
true
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Last modified 4mo ago

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Contents

Has map key

Select, checking for existence of deep paths

Has array index