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category.go
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/
category.go
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package main
import (
"database/sql"
)
type category struct {
Category_ID string `json:"category_id"`
Name string `json:"name"`
Description string `json:"description"`
}
func (c *category) createCategory(db *sql.DB) error {
err := db.QueryRow(
"INSERT INTO categories(name, description) VALUES ($1, $2) RETURNING category_id",
c.Name, c.Description,
).Scan(&c.Category_ID)
return err
}
func (c *category) getCategory(db *sql.DB) error {
return db.QueryRow(
"SELECT name, description FROM categories WHERE category_id=$1",
c.Category_ID,
).Scan(&c.Name, &c.Description)
}
func (c *category) updateCategory(db *sql.DB) error {
_, err := db.Exec(
"UPDATE categories SET name=$1, description=$2 WHERE category_id=$3",
c.Name, c.Description, c.Category_ID,
)
return err
}
func (c *category) deleteCategory(db *sql.DB) error {
_, err := db.Exec("DELETE FROM categories WHERE category_id=$1", c.Category_ID)
return err
}
func (c *category) deleteCategoryTasks(db *sql.DB) error {
_, err := db.Exec("DELETE FROM tasks WHERE category_id=$1", c.Category_ID)
return err
}
func getCategories(db *sql.DB) ([]category, error) {
rows, err := db.Query("SELECT category_id, name, description FROM categories")
if err != nil {
return nil, err
}
defer rows.Close()
categories := []category{}
for rows.Next() {
var c category
err := rows.Scan(&c.Category_ID, &c.Name, &c.Description)
if err != nil {
return nil, err
}
categories = append(categories, c)
}
return categories, nil
}