57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
#include "database.h"
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#include <iostream>
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#include <stdexcept>
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Database::Database(const std::string& dbname) : db_(nullptr)
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{
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const int errCode = sqlite3_open(dbname.c_str(), &db_);
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if (errCode) {
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throw std::runtime_error("Could not open database file.");
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}
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exec("PRAGMA foreign_key = 1");
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}
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Database::~Database() { sqlite3_close(db_); }
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void Database::exec(const std::string& sql)
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{
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const int errCode = sqlite3_exec(db_, sql.c_str(), nullptr, nullptr, nullptr);
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if (errCode) {
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throw std::runtime_error("Error in SQL execution.");
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}
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}
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void Database::init()
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{
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std::string sqlCreateSellers{"CREATE TABLE IF NOT EXISTS sellers ("
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"id TEXT PRIMARY KEY NOT NULL, "
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"seller_no INTEGER, "
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"first_name TEXT, "
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"last_name TEXT, "
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"offered_articles INTEGER, "
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"UNIQUE (seller_no)"
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");"};
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std::string sqlCreateArticles{
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"CREATE TABLE IF NOT EXISTS articles ("
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"id TEXT PRIMARY KEY NOT NULL, "
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"seller_id TEXT NOT NULL, "
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"source_no INTEGER NOT NULL, "
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"article_no INTEGER NOT NULL, "
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"description TEXT, "
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"price INTEGER NOT NULL, "
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"UNIQUE (source_no, article_no), "
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"FOREIGN KEY (seller_id) REFERENCES sellers(id) ON DELETE CASCADE, "
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"CHECK (article_no BETWEEN 0 AND 99999)"
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");"};
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beginTransaction();
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exec(sqlCreateSellers);
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exec(sqlCreateArticles);
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endTransaction();
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}
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void Database::beginTransaction() { exec("BEGIN TRANSACTION"); }
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void Database::endTransaction() { exec("END TRANSACTION"); } |