Hi,
I think the data column is jsonb type.
wsysdb=> select * from jtable;
data
---------------------
["first", "second"]
["third", "fourth"]
(2 rows)
wsysdb=> \d+ jtable;
Table "public.jtable"
Column | Type | Modifiers | Storage | Stats target | Description
--------+-------+-----------+----------+--------------+-------------
data | jsonb | | extended | |
maanantai 4. tammikuuta 2016 19.41.29 UTC+2 Jon Rosebaugh kirjoitti:
>
> The @> operator (contains) is defined only for JSONB; your original
> message said you were using JSONB. However, this error says your column
> is just JSON. These two types are not the same thing; you should use
> JSONB if you have a choice.
>
> On Thu, Dec 31, 2015, at 03:43 PM, Sami Pietilä wrote:
> > Perhaps there is something wrong with my select. I tried with following
> > select and got an error message below:
> >
> select([database.tables['jtable'].c['data']]).where(database.tables['jtable'].c['data'].contains('third'))
>
>
> >
> > --- Error Message ---
> > sqlalchemy.exc.DataError: (psycopg2.DataError) invalid input syntax for
> > type json
> > LINE 3: WHERE jtable.data @> 'third'
> > ^
> > DETAIL: Token "third" is invalid.
> > CONTEXT: JSON data, line 1: third
> > [SQL: 'SELECT jtable.data \nFROM jtable \nWHERE jtable.data @>
> > %(data_1)s'] [parameters: {'data_1': 'third'}]
> >
> >
> > torstai 31. joulukuuta 2015 16.11.47 UTC+2 Jon Rosebaugh kirjoitti:
> > >
> > > Your SQL itself isn't going to work; there's no 'item' column in your
> > > select statement. You should read
> > > http://www.postgresql.org/docs/9.4/interactive/functions-json.html
> to
> > > see what operators you have. (I think you want '@>', not LIKE.)
> > >
> > > In SQLAlchemy, this would be done as
> > > .where(mytable.c['data'].contains('third')).
> > >
> > >
> >
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