I write this code, but its not working, it gives this error
Call to a member function commit() on a non-object
Hear is my code
$datasource = $this->Arrear->getDataSource();
$datasource->begin();
if($this->Customar->saveField("total_bake",$amount) && $this->Arrear->save()){
$dataSource->commit();
return $this->redirect(array('action'=>'index'));
}else{
$dataSource->rollback();
$this->Session->setFlash('Data insert Failed','failure');
}
Variables in php(and hence in cakephp as well) are case-sensitive
http://php.net/manual/en/language.variables.basics.php
you have in your first line
$datasource = $this->Arrear->getDataSource();
but you are committing like
$dataSource->commit();
you have the data source assigned to $datasource, but not to $dataSource. The last variable even is not defined, that is why it is showing that error. So, you have to be sure you are using exactly the same variable (with same capitalization) in all places.
Related
I am trying to add a function to my Conky which prints the length of a string for debug purposes. The code, inside a file called test.lua, is pretty trivial:
function test(word)
return string.len(word)
end
...and I load it like this. In my conky.config section I have:
lua_load = '/home/xvlaze/test.lua',
lua_draw_hook_pre = 'test'
...in the conky.text section I have:
${lua test "fooo"}
...where test is the name of the function and fooo the string to test.
The expected result should be a printed 4 in Conky, but instead of that I get:
conky: llua_do_call: function conky_test execution failed: /home/xvlaze/test.lua:2: attempt to index a nil value (local 'string')
conky: llua_getstring: function conky_test didn't return a string, result discarded
I have browsed through the documentation, but I can't find anything. Does anybody know where the failure is?
Several guidances on how to implement functions in Conky:
First of all: YOU MUST USE conky_ BEFORE YOUR FUNCTION'S NAME.
Otherwise, you will get the following error when running your Conky:
attempt to call a nil value
Secondly: YOU MUST ALWAYS RETURN A VALUE.
I don't mind repeating it - it is crucial. Otherwise, you will get:
function foobar didn't return a string, result discarded
function_result
...in your terminal, and your Conky will be left empty of values related to your extra code. Nothing will be printed regarding your function.
Last but not least: YOU MUST ALWAYS CALL YOUR FUNCTION LIKE:
lua_load = '/path/to/function.lua',
-- Whatever content...
${lua function_name function_parameter1 function_parameterN} -- In case you use more than one parameter.
In summary, a dummy function template could be:
MAIN FILE (conky.conf):
conky.config = {
-- Whatever content... Lua styled comments.
lua_load = '/path/to/function.lua',
}
conky.text = [[
# Whatever content... In this section comments are started with '#'!
${lua function_name parameter}
]]
FUNCTION FILE:
function conky_function_name(parameter)
-- Whatever content... Remember this is Lua, not conky.text syntax. Always use '--' comments!
return whatever -- No return, no party. A function MUST always return something!
end
I'm working with lua-alchemy, and I'm setting a global variable in my AS3 code in this way:
_lua.setGlobal("map", _map);
With _map being a object with the following function in it:
public function get x():int
{
return 10;
}
if then I try to do something like this in Lua
local a = map.x + 1
I get the following error:
Lua script failed: luaDoString:21: attempt to perform arithmetic on field 'x' (a table value)
Does anyone knows why it does that, and how I could fix it?
EDIT :
When I print type(map.id), it prints table... Shouldn't it print number?
I found my error. According to this page, I have to use as3.tolua(map.x) to convert it to the right type.
I would like to trigger a method of an object by using BINDEVENT(), but the method may not exist. Thus, I want to check if the method is defined before issuing BINDEVENT().
For example, in the following code snippet, if oHandler.myresize() does not exist, the error will be triggered at the line of BINDEVENT().
PUBLIC oHandler
oHandler=NEWOBJECT("myhandler")
DO (_browser)
BINDEVENT(_SCREEN,"Resize",oHandler,"myresize")
DEFINE CLASS myhandler AS Session
PROCEDURE myresize
IF ISNULL(_obrowser) THEN
UNBINDEVENTS(THIS)
ELSE
_obrowser.left = _SCREEN.Width - _obrowser.width
ENDIF
RETURN
ENDDEFINE
Thus, I want to check the method myresize() exists or not.
Is there any language function for this purpose? It is very similar to a php function function_exits() or method_exists().
PEMSTATUS( VariableNameRepresentingTheObject, "MethodOrPropertyLookingFor", 5 )
returns true or false if exists on the given object.
In my controller I have called a model that makes a mysql query to fetch information from table. It is working okay but now under the same function I want to call another model and make a query based on one of the results from the previous mysql query. (The field name which I want to get the result of is "batch") . I have tried to get the value (batch) right in my controller, pass it into the model and then tried to make the second query but it seems like the second model is not getting the value from the controller and hence its not working. Would you please kindly help me with this?
Thanks in Advance :)
Here is my Controller
function Get($id){
$this->load->model('mod_studentprofile');
$data['query']= $this->mod_studentprofile->student_get($id);
// To get the batch name
$batch= $query ['batch']; // This I get from the above query result.
$this->load->model('batchname');
$data['query1']= $this->batchname->batchname($batch);
$data['tab'] = "Student Profile";
$data['main_content']='studentprofile';
$this->load->view('includes/template',$data);
}
Here is my model number 1
function student_get($id)
{
$query=$this->db->get_where('student',array('studentid'=>$id));
return $query->row_array();
}
Here is my model number 2
function batchname($batch)
{
$query1=$this->db->get_where('batch',array('batchid'=>$batch));
return $query1->row_array();
}
Well, you're not actually assigning anything to $batch, how about this:
$batch= $data['query'];
This now passes the variable along. As a side note, you can pass it as a paramater and be done with it in a single line, dependency injection style:
$data['query1']= $this->batchname->batchname($this->mod_studentprofile->student_get($id));
Are you getting a value back from the first query?
I would log the value you are getting back from the first query in your controller.
log_message('debug', 'Batch value is '.$batch);
And also put in some debug to see what the query that is being ran.
function batchname($batch)
{
$query1=$this->db->get_where('batch',array('batchid'=>$batch));
$str = $this->db->last_query();
log_message('debug', 'Batchname Query: '.$str);
return $query1->row_array();
}
I'm using GUIDE to create an interface where a function [x,y]=function(a,b,c,d) will be executed when the button is clicked. Im having problems to get this to work. GUIDE creates an autogenerated function with the syntax varargout = LineasA(varargin).
I'm calling the GUI using this syntax [x,y]=LineasA(a,b,c,d).
Errors I get are:
Error in ==> LineasA>LineasA_OutputFcn at 73
varargout{1} = handles.output;
??? Error using ==> feval
Output argument "varargout{2}" (and maybe others) not assigned during call to
"C:\Users\ZeTa\Documents\MATLAB\ImagenB\LineasA.m>LineasA_OutputFcn".
Error in ==> gui_mainfcn at 263
[varargout{1:nargout}] = feval(gui_State.gui_OutputFcn, gui_hFigure, [],
gui_Handles);
Error in ==> LineasA at 40
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
Error in ==> ImagenB at 17
[MatrizB,Cuenta]=LineasA(Cuenta,waveformObj,channelObj,MatrizB);
You have to be clear where you are getting the inputs to this function, and where you want the outputs to go. It is proper coding to store the inputs and outputs in the handles struct that is passed into the callback. Also, the proper callback structure is:
LineasA(hObject, eventdata, handles)
However, if you insist on calling and storing from the base workspace, you can do as follows:
LineasA(hObject, eventdata, handles)
% grab values from base workspace
Cuenta = evalin('base', 'Cuenta');
waveformObj = evalin('base', 'waveformObj');
channelObj = evalin('base', 'channelObj');
MatrizB = evalin('base', 'MatrizB');
% the rest of your code
% assign outputs
assignin('base', 'MatrizB', matrizB);
assignin('base', 'Cuenta', Cuenta);
end
However I recommend getting those values in the handles structure and not to use evalin and assignin, they are usually bad coding techniques.