remove object from 2 layer nested JSONB[] column - database

Question

Here I how my data is in the column
[
{
"exercises": [
{
"exercise_name": "test",
"exercise_video": {
"media_id": "id_1",
"video_url": "URL",
"media_name": "HIIT.mp4",
"video_play_at": 0,
"is_video_muted": true,
"video_duration": 0,
"video_play_duration": 120,
"is_video_play_in_loop": true
},
"show_countdown": true,
"show_to_participants": false,
"exercise_duration_in_seconds": 120
},
{
"exercise_name": "test1",
"exercise_video": {
"media_id": "id_2",
"video_url": "URL",
"media_name": "HIIT.mp4",
"video_play_at": 0,
"is_video_muted": true,
"video_duration": 0,
"video_play_duration": 120,
"is_video_play_in_loop": true
},
"show_countdown": true,
"show_to_participants": false,
"exercise_duration_in_seconds": 120
}
],
"segment_icon": "Barre",
"segment_name": "test",
"segment_duration_in_seconds": 120
}
]
I need to remove entire exercise_video object if media_id = id_2. Expected final result
[
{
"exercises": [
{
"exercise_name": "test",
"exercise_video": {
"media_id": "id_1",
"video_url": "URL",
"media_name": "HIIT.mp4",
"video_play_at": 0,
"is_video_muted": true,
"video_duration": 0,
"video_play_duration": 120,
"is_video_play_in_loop": true
},
"show_countdown": true,
"show_to_participants": false,
"exercise_duration_in_seconds": 120
},
{
"exercise_name": "test1",
"show_countdown": true,
"show_to_participants": false,
"exercise_duration_in_seconds": 120
}
],
"segment_icon": "Barre",
"segment_name": "test",
"segment_duration_in_seconds": 120
}
]
WITH updated_activity AS (
SELECT activity_id,
('{exercises,'||index-1||',exercise_video.media_id}')::text[] as path
FROM activity,
jsonb_array_elements(
(workout_builder_test->>'exercises')::jsonb->'exercise_video'
) with ordinality arr(x,index)
WHERE x->> 'media_id' = 'id_2'
)
UPDATE activity
SET workout_builder_test = workout_builder_test #- updated_activity.path
FROM updated_activity
WHERE activity.activity_id = updated_activity.activity_id
AND activity.gym_id = 'gym_id'

Answer 1

Your code is pretty close, just some problems with your paths. Here an example with paths mended:
SELECT activity_id,
jsonb_pretty( workout_builder_test #- ('{0,exercises,'||e.i-1/*index of part to remove*/||',exercise_video}')::text[])
from activity, jsonb_array_elements(workout_builder_test->0->'exercises') with ordinality as e(cont, i)
where e.cont->'exercise_video'->'media_id'='"id_2"';
working example here