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Improve performance of counting and iterating states in templates (#40250)

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Co-authored-by: Anders Melchiorsen <amelchio@nogoto.net>
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J. Nick Koston 2020-09-26 11:36:47 -05:00 • committed by GitHub
parent 1d41f024cf
commit 35533407fe
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4 changed files with 55 additions and 11 deletions
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11
tests/helpers/test_template.py
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@ -2420,3 +2420,14 @@ For loop example getting 3 entity values:
assert "sensor0" in result
assert "sensor1" in result
assert "sun" in result
async def test_slice_states(hass):
"""Test iterating states with a slice."""
hass.states.async_set("sensor.test", "23")
tpl = template.Template(
"{% for states in states | slice(1) -%}{% set state = states | first %}{{ state.entity_id }}{%- endfor %}",
hass,
)
assert tpl.async_render() == "sensor.test"