Derive Macro QueryParams 

#[derive(QueryParams)]
{
    // Attributes available to this derive:
    #[orm]
}

Derive QueryParams helpers for building dynamic queries from a params struct.

Example

use pgorm::QueryParams;

#[derive(QueryParams)]
#[orm(model = "User")]
struct UserSearchParams<'a> {
    #[orm(eq(UserQuery::COL_ID))]
    id: Option<i64>,
    #[orm(eq(UserQuery::COL_EMAIL))]
    email: Option<&'a str>,
}

let q = UserSearchParams { id, email }.into_query()?;

Attributes

Struct-level:

• #[orm(model = "TypePath")] - The model type that provides Model::query()

Field-level:

• #[orm(eq(COL))] - Equality filter (auto uses eq_opt_str for &str/String)
• #[orm(eq_str(COL))] - Equality filter, forcing string conversion
• #[orm(eq_map(COL, map_fn))] - Equality filter after mapping (e.g. parse)
• #[orm(map(map_fn))] - Optional mapper (returns Option<T>; None means “skip filter”)
• #[orm(ne(COL))] / #[orm(gt(COL))] / #[orm(gte(COL))] / #[orm(lt(COL))] / #[orm(lte(COL))]
• #[orm(like(COL))] / #[orm(ilike(COL))] / #[orm(not_like(COL))] / #[orm(not_ilike(COL))]
• #[orm(in_list(COL))] / #[orm(not_in(COL))]
• #[orm(between(COL))] / #[orm(not_between(COL))] (expects (T, T) or Option<(T, T)>)
• #[orm(is_null(COL))] / #[orm(is_not_null(COL))] (expects bool or Option<bool>)
• #[orm(order_by)] - Replace the OrderBy builder (expects OrderBy or Option<OrderBy>)
• #[orm(order_by_asc)] / #[orm(order_by_desc)] - Add an ORDER BY column (expects a column ident or Option<...>)
• #[orm(order_by_raw)] - Add a raw ORDER BY item (escape hatch)
• #[orm(paginate)] - Replace the Pagination builder (expects Pagination or Option<Pagination>)
• #[orm(limit)] / #[orm(offset)] - Set LIMIT/OFFSET (expects i64 or Option<i64>)
• #[orm(page)] - Page-based pagination (expects (page, per_page) or Option<(page, per_page)>)
• #[orm(page(per_page = EXPR))] - Page-based pagination from a page number (expects i64/Option<i64>)
• #[orm(raw)] - Raw WHERE fragment (escape hatch)
• #[orm(and)] / #[orm(or)] - Combine a WhereExpr (escape hatch)
• #[orm(skip)] - Ignore this field