CFTRACE | |||
Description
Displays and logs debugging data about the state of an application at the time the cftrace tag executes. Tracks runtime logic flow, variable values, and execution time. Displays output at the end of the request or in the debugging section at the end of the request; or, in Dreamweaver MX and later, in the Server Debug tab of the Results window. ColdFusion logs cftrace output to the file logs\cftrace.log, in the ColdFusion installation directory.
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Category
Debugging tags, Variable manipulation tags | |||
Syntax<cftrace abort = "Yes" or "No" category = "string" inline = "Yes" or "No" text = "string" type = "format" var = "variable_name" </cftrace> |
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See also
cfdump, cferror, cfrethrow, cftimer, cftry; Chapter 18, "Debugging and Troubleshooting Applications" in ColdFusion MX Developer's Guide |
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History
ColdFusion MX: Added this tag.
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Usage
You cannot put application code within this tag. (This avoids problems that can occur if you disable debugging.) This tag is useful for debugging CFML code during application development. You can display cftrace tag output in the following ways:
This is an example of a log file entry: "Information","web-4","04/08/02","23:21:30", ,"[30 ms (1st trace)] [C:\CFusionMX7\wwwroot\generic.cfm @ line: 9] - [thisPage = /generic.cfm] " "Information","web-0","04/08/02","23:58:58", ,"[5187 ms (10)] [C:\CFusionMX7\wwwroot\generic.cfm @ line: 14] - [category] [thisPage = /generic.cfm] [ABORTED] thisPage " For a complex variable, ColdFusion lists the variable name and the number of elements in the object; it does not log the contents of the variable. |
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Example
The following example traces a FORM variable that is evaluated by a cfif block: <cftrace var="FORM.variable" text="doing equivalency check for FORM.variable" category="form_vars" inline="true"> <cfif isDefined("FORM.variable") AND #FORM.variable# EQ 1> <h1>Congratulations, you're a winner!</h1> <cfelse> <h1>Sorry, you lost!</h1> </cfif> |
ABORT | |
Optional | |
Default value: "No"
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CATEGORY | |
Optional | |
User-defined string for identifying trace groups. |
INLINE | |
Optional | |
Default value: "No"
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TEXT | |
Optional | |
User-defined string, which can include simple variables, but not complex variables such as arrays. Outputs to the cflog text attribute. |
TYPE | |
Optional | |
Default value: "Information"
Corresponds to the cflog type attribute; displays an appropriate icon:
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VAR | |
Optional | |
The name of a simple or complex variable to display. Useful for displaying a temporary value, or a value that does not display on any CFM page. |