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Re: error in example/SQLApp [message #13755 is a reply to message #13733]

Fri, 25 January 2008 23:16

mirek
Messages: 14266
Registered: November 2005

Ultimate Member

sergeynikitin wrote on Fri, 25 January 2008 05:00

Thanks. And Sorry for my English.

Now (this time) I try to understand technique (or technology) of life with UPP and I have additional time to analize expamples.

I found this TOOL is interest and powerful.

And I found one more strange thing in this example.

File borrow.cpp, lines from 14 to 27 - Function

Value DateIntConvertCls::Scan(const Value& text) const
{
	String txt = text;
	if(IsNull(txt))
		return Null;
	Date d;
	if(StrToDate(d, txt)) {
		const char *s = txt;
		while(*s == ' ') s++;
		if(*s == '\0')
			return d - Date(1970, 1, 1);
	}
	return ErrorValue("Invalid date!");
}

I add there one string return d - Date(1970, 1, 1);.

Value DateIntConvertCls::Scan(const Value& text) const
{
	String txt = text;
	if(IsNull(txt))
		return Null;
	Date d;
	if(StrToDate(d, txt)) {
		const char *s = txt;
		while(*s == ' ') s++;
		if(*s == '\0')
			return d - Date(1970, 1, 1);
	}
	return d - Date(1970, 1, 1);
	// ^^^^^^^^^^^^^^^^^^^^^^^^^        
	return ErrorValue("Invalid date!");
}

Without this string, I can't to edit Date fields, when I add borrow records. I can add only empty dates.
This may be my mistake or mistake of program.

SQLApp - is a complex example, because many of newbies see to this application and this application is face of system.
And this app must be a exapmle of stability ( Smile

Stupid me. That is the price to pay when you are overengineering the code, and not test it enough in the same time...

Value DateIntConvertCls::Scan(const Value& text) const
{
	String txt = text;
	if(IsNull(txt))
		return Null;
	Date d;
	if(StrToDate(d, txt))
		return d - Date(1970, 1, 1);
	return ErrorValue("Invalid date!");
}

Thanks!

Mirek

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