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62 lines
1.5 KiB
Markdown
62 lines
1.5 KiB
Markdown
---
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aliases:
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- /doc/debugging/
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- /layout/debugging/
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lastmod: 2015-05-25
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date: 2015-05-22
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linktitle: Debugging
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menu:
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main:
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parent: layout
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prev: /templates/404
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title: Template Debugging
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weight: 110
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---
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# Template Debugging
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Here are some snippets you can add to your template to answer some common questions.
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These snippets use the `printf` function available in all Go templates. This function is
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an alias to the Go function, [fmt.Printf](http://golang.org/pkg/fmt/).
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### What variables are available in this context?
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You can use the template syntax, `$.`, to get the top-level template context
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from anywhere in your template. This will print out all the values under, `.Site`.
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{{ printf "%#v" $.Site }}
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This will print out the value of `.Permalink`:
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{{ printf "%#v" .Permalink }}
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This will print out a list of all the variables scoped to the current context
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(a.k.a. The dot, "`.`").
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{{ printf "%#v" . }}
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When writing a [Homepage](/templates/homepage), what does one of the pages
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you're looping through look like?
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```
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{{ range .Data.Pages }}
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{{/* The context, ".", is now a Page */}}
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{{ printf "%#v" . }}
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{{ end }}
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```
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### Why do I have no variables defined?
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Check that you are passing variables in the `partial` function. For example
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```
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{{ partial "header" }}
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```
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will render the header partial, but the header partial will not have access to any variables. You need to pass variables explicitly. For example:
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```
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{{ partial "header" . }}
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```
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