[fpc-devel] Re: [fpc-pascal] fcl-web webdata example(s) on Windows has some problems

ABorka fpc-devel at aborka.com
Wed Aug 18 07:38:46 CEST 2010

did some more testing:


1. minor note: We should not forget that field names are case sensitive 
in ExtJS, so any database field names need to be entered exactly:
       fields: ["id","login","name","email", "lastlogin"]
is not the same as
       fields: ["ID","LOGIN","NAME","EMAIL", "LASTLOGIN"]

           {header: 'ID', dataIndex: "id", sortable: true, hidden: true},
is not the same as
           {header: 'ID', dataIndex: "ID", sortable: true, hidden: true},

In the demo projects a DBF table is used with all capital letter field 
names. When I tried to use MySQL, it took me some time to realize this 
problem. Having zero errors displayed for this didn't help either :)

2. major: It seems that the error/exception handling does not have the 
proper server responses for ExtJS (when read/insert/update/delete 
happens on the data), because with any exceptions there is nothing 
displayed but the empty grid with "no data to display" note.
Apparently, we need to append a '"rows" : ""' to our responses in order 
for ExtJS to properly accept our reply with the error message (being 
"rows" is our root element and ExtJS requires this):
ex: instead of
{ "success" : false, "message" : "Blahblah exception occured CGI side" }

it should be

'{ "success" : false, "message" : "Blahblah exception occured CGI side", 
"rows" : ""}

(not sure how using XML instead of JSON needs this done differently)
This needs to be done within our reply generation internally (fcl-web) 
when there is an error/exception or the message will never be displayed 
client side. Explanation:
In our *.js we have
data.addListener('exception', function(proxy, type, action, options, res) {
     if (type === 'remote') {
             title: 'REMOTE EXCEPTION',
             msg: res.message,
             icon: Ext.MessageBox.ERROR,
             buttons: Ext.Msg.OK

ExtJS however, will only have 'remote' type if the server response is 
proper for it (having a root /which is "rows"/ in our case), all other 
cases instead of 'remote' it has the type 'response', regardless of our 
"success" property being true or false.


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