Method add_answer

ch_09/src/store.rs:161–197

(
        self,
        new_answer: NewAnswer,
        account_id: AccountId,
    )

    }

    pub async fn add_answer(
        self,
        new_answer: NewAnswer,
        account_id: AccountId,
    ) -> Result<Answer, Error> {
        match sqlx::query(
            "INSERT INTO answers (content, corresponding_question, account_id) VALUES ($1, $2, $3)",
        )
        .bind(new_answer.content)
        .bind(new_answer.question_id.0)
        .bind(account_id.0)
        .map(|row: PgRow| Answer {
            id: AnswerId(row.get("id")),
            content: row.get("content"),
            question_id: QuestionId(row.get("question_id")),
        })
        .fetch_one(&self.connection)
        .await
        {
            Ok(answer) => Ok(answer),
            Err(error) => {
                tracing::event!(
                    tracing::Level::ERROR,
                    code = error
                        .as_database_error()
                        .unwrap()
                        .code()
                        .unwrap()
                        .parse::<i32>()
                        .unwrap(),
                    db_message = error.as_database_error().unwrap().message(),
                    constraint = error.as_database_error().unwrap().constraint().unwrap()
                );
                Err(Error::DatabaseQueryError(error))
            }
        }
    }

    pub async fn add_account(
        self,