Yes, Mike, that solved the problem! I forgot to pass the column name.
Now I get a different error: bindparam is not json-serializable.
StatementError('(builtins.TypeError) Object of type BindParameter is not
JSON serializable'),
Is the JSONB column not supporting lazy/bindparam-compatible "preparing" of
queries?
Il giorno mar 15 set 2020 alle ore 17:13 Mike Bayer <
mike...@zzzcomputing.com> ha scritto:
> the dictionary is with column names as keys:
>
>
> set_={"data": bindparam("timestamps")}
>
> hope this helps
>
>
>
> On Tue, Sep 15, 2020, at 10:55 AM, Massimiliano della Rovere wrote:
>
> Greetings,
> I am using SQLAlchemy==1.3.18.
>
> I have an SQLAlchemy "Settings" table with a "data" column defined as:
>
> from sqlalchemy.dialects.postgresql import JSONB
> Settings = Table(
> "settings",
> self._metadata,
> # ...
> Column("data", JSONB, nullable=False))
>
> and later in the code this "baked" query:
>
> from sqlalchemy.dialects.postgresql import insert as pinsert, JSONB
> query = (
> pinsert(Settings)
> .values({
> "key": "xxx",
> "data": bindparam("timestamps", type_=JSONB)})
> .on_conflict_do_update(
> index_elements=(Settings.columns.key,),
> set_=bindparam("timestamps", type_=JSONB))
>
> The python interpreter throws me the following error raised by
> sqlalchemy.dialects.postgresql.dml line 227:
> if not isinstance(set_, dict) or not set_:
> raise ValueError("set parameter must be a non-empty
> dictionary")
>
> it seems that the "set_" parameter of the "on_conflict_do_update" method
> requires a dict, and thus is not compatible with bindparam.
> I have also tried to set the "type_" parameter of bindparam to dict, but
> I did not solve the problem.
>
> Please, can anybody help me?
>
>
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> The Python SQL Toolkit and Object Relational Mapper
>
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>
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SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
To post example code, please provide an MCVE: Minimal, Complete, and Verifiable
Example. See http://stackoverflow.com/help/mcve for a full description.
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