Golang SQLBoiler append queries dynamically

Question

I'm trying to dynamically run queries against my Postgres database, but can't fully wrap my head around it.

The solution I'm looking for is one where I can set the query dynamically, perhaps by appending parameters to the final query throughout the code, and then have only one instance of the query being executed.

As mentioned in the title I am using SQLBoiler to interface with Postgres.

Here's what I'm looking for in pseudo code:

final_query := QueryMod{
    Where("(mt_mas = ? or mt_mem like ?) and mt_group = ?", uint(uid), `%"`+strconv.Itoa(uid)+`"%`, bool(mt_group_bool)),
}

if a == 1 {
    final_query = append(final_query, And(" and mt_important = ?", bool(false)))
} else {
    final_query = append(final_query, And(" and mt_ness = ?", bool(true)))
}

res_mt_count, err := models.MTs(
    final_query,
).All(CTX, DB)

Thankful for any help along the way! :)

Answer 1

mkopriva solved my problems with the following solution:

type QueryModSlice []qm.QueryMod

func (s QueryModSlice) Apply(q *queries.Query) {
    qm.Apply(q, s...)
}

func main() {
    mods := QueryModSlice{
        qm.Where("(mt_mas = ? or mt_mem like ?) and mt_group = ?", uint(uid), `%"`+strconv.Itoa(uid)+`"%`, bool(mt_group_bool)),
    }

    if a == 1 {
        mods = append(mods, qm.And(" and mt_important = ?", bool(false)))
    } else {
        mods = append(mods, qm.And(" and mt_ness = ?", bool(true)))
    }

    res_mt, err := models.MTs(mods).All(CTX, DB)

}

Thanks a bunch! :)