Filter array attribute in jsonb column type using jsonb_array_elements_text

Question

My Postgres version: 10.9

Using JsonB Column type which has a below structure:

columnName: favorites
{
"favouriteCity": "Boston",
"favoriteColors": ["Blue", "Red", "Green"],
}

Now, I want to filter all records which have favorite colors as Blue assigned.

I tried the below queries, but it didn't work.

select * 
from r_fav 
where favorites->>'favoriteColors' in ('Blue', 'Red')

or

jsonb_array_elements_text(favorites->>'favoriteColors' @>'Blue', 'Red')

Any idea how can I filter this?

Answer 1

You can use the contains all ?& operator with arrays:

select * 
from r_fav 
where favorites -> 'favoriteColors' ?| array['Blue', 'Red']

That will return rows at least one of the colors exist in the array. If want those where all colors are contained, use the operator ?& instead

Answer 2

Use an array of values, bear in mind both values must be included in favoriteColors

select
    favourites->'favouriteCity'
from
    t
where
    favourites->'favoriteColors' @> '["Blue","Red"]'::jsonb;

| ?column? |
| :------- |
| "Boston" |

Let me add this comment of jjanes:

You could also put the key name on the other side of the @> operator. select favourites->'favouriteCity' from t where favourites @> '{"favoriteColors":["Blue","Red"]}'::jsonb; The two ways of formulating it will benefit from different indexes, so it may be worthwhile to try both

db<>fiddle here