zrm/tests/relations.zig

const std = @import("std");
const pg = @import("pg");
const zrm = @import("zrm");
const repository = @import("repository.zig");

/// PostgreSQL database connection.
var database: *pg.Pool = undefined;

/// Initialize database connection.
fn initDatabase(allocator: std.mem.Allocator) !void {
	database = try pg.Pool.init(allocator, .{
		.connect = .{
			.host = "localhost",
			.port = 5432,
		},
		.auth = .{
			.username = "zrm",
			.password = "zrm",
			.database = "zrm",
		},
		.size = 1,
	});
}

test "belongsTo" {
	zrm.setDebug(true);

	try initDatabase(std.testing.allocator);
	defer database.deinit();
	var poolConnector = zrm.database.PoolConnector{
		.pool = database,
	};

	// Build a query of submodels.
	var myQuery = repository.MySubmodelRepository.QueryWith(
		// Retrieve parents of submodels from relation.
		&[_]zrm.relations.ModelRelation{repository.MySubmodelRelations.parent}
	).init(std.testing.allocator, poolConnector.connector(), .{});
	defer myQuery.deinit();

	try myQuery.buildSql();

	// Get query result.
	var result = try myQuery.get(std.testing.allocator);
	defer result.deinit();

	// Checking result.
	try std.testing.expectEqual(2, result.models.len);
	try std.testing.expectEqual(1, result.models[0].parent_id);
	try std.testing.expectEqual(1, result.models[1].parent_id);
	try std.testing.expectEqual(repository.MyModel, @TypeOf(result.models[0].parent.?));
	try std.testing.expectEqual(repository.MyModel, @TypeOf(result.models[1].parent.?));
	try std.testing.expectEqual(1, result.models[0].parent.?.id);
	try std.testing.expectEqual(1, result.models[1].parent.?.id);
}