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meal.go
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meal.go
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package pg
import (
"database/sql"
"fmt"
"github.com/Digital-Voting-Team/menu-service/internal/data"
"gitlab.com/distributed_lab/kit/pgdb"
sq "github.com/Masterminds/squirrel"
"github.com/fatih/structs"
)
const mealsTableName = "public.meals"
func NewMealsQ(db *pgdb.DB) data.MealsQ {
return &mealsQ{
db: db.Clone(),
sql: sq.Select("meals.*").From(mealsTableName),
sqlUpdate: sq.Update(mealsTableName).Suffix("returning *"),
}
}
type mealsQ struct {
db *pgdb.DB
sql sq.SelectBuilder
sqlUpdate sq.UpdateBuilder
}
func (q *mealsQ) New() data.MealsQ {
return NewMealsQ(q.db)
}
func (q *mealsQ) Get() (*data.Meal, error) {
var result data.Meal
err := q.db.Get(&result, q.sql)
if err == sql.ErrNoRows {
return nil, nil
}
return &result, err
}
func (q *mealsQ) Select() ([]data.Meal, error) {
var result []data.Meal
err := q.db.Select(&result, q.sql)
return result, err
}
func (q *mealsQ) Update(meal data.Meal) (data.Meal, error) {
var result data.Meal
clauses := structs.Map(meal)
clauses["meal_name"] = meal.MealName
clauses["category_id"] = meal.CategoryId
clauses["price"] = meal.Price
clauses["amount"] = meal.Amount
err := q.db.Get(&result, q.sqlUpdate.SetMap(clauses))
return result, err
}
func (q *mealsQ) Transaction(fn func(q data.MealsQ) error) error {
return q.db.Transaction(func() error {
return fn(q)
})
}
func (q *mealsQ) Insert(meal data.Meal) (data.Meal, error) {
clauses := structs.Map(meal)
clauses["meal_name"] = meal.MealName
clauses["category_id"] = meal.CategoryId
clauses["price"] = meal.Price
clauses["amount"] = meal.Amount
var result data.Meal
stmt := sq.Insert(mealsTableName).SetMap(clauses).Suffix("returning *")
err := q.db.Get(&result, stmt)
return result, err
}
func (q *mealsQ) Delete(id int64) error {
stmt := sq.Delete(mealsTableName).Where(sq.Eq{"id": id})
err := q.db.Exec(stmt)
return err
}
func (q *mealsQ) Page(pageParams pgdb.OffsetPageParams) data.MealsQ {
q.sql = pageParams.ApplyTo(q.sql, "id")
return q
}
func (q *mealsQ) FilterById(ids ...int64) data.MealsQ {
q.sql = q.sql.Where(sq.Eq{"id": ids})
q.sqlUpdate = q.sqlUpdate.Where(sq.Eq{"id": ids})
return q
}
func (q *mealsQ) FilterByNames(names ...string) data.MealsQ {
q.sql = q.sql.Where(sq.Eq{"meal_name": names})
return q
}
func (q *mealsQ) FilterByPriceFrom(prices ...float64) data.MealsQ {
stmt := sq.GtOrEq{"price": prices}
q.sql = q.sql.Where(stmt)
return q
}
func (q *mealsQ) FilterByPriceTo(prices ...float64) data.MealsQ {
stmt := sq.LtOrEq{"price": prices}
q.sql = q.sql.Where(stmt)
return q
}
func (q *mealsQ) FilterByAmount(amounts ...float64) data.MealsQ {
q.sql = q.sql.Where(sq.Eq{"amount": amounts})
return q
}
func (q *mealsQ) FilterByCategoryId(ids ...int64) data.MealsQ {
q.sql = q.sql.Where(sq.Eq{"category_id": ids})
return q
}
func (q *mealsQ) JoinCategory() data.MealsQ {
stmt := fmt.Sprintf("%s as meals on public.categories.id = meals.category_id",
mealsTableName)
q.sql = q.sql.Join(stmt)
return q
}