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125 lines
3.6 KiB
Markdown
125 lines
3.6 KiB
Markdown
---
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title: Store
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description: Returns a persistent "scratch pad" on the given page to store and manipulate data.
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categories: []
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keywords: []
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action:
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related:
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- methods/page/scratch
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- functions/collections/NewScratch
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returnType: maps.Scratch
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signatures: [PAGE.Store]
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toc: true
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aliases: [/functions/store]
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---
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The `Store` method on a `Page` object creates a persistent [scratch pad] to store and manipulate data. In contrast with the [`Scratch`] method, the scratch pad created by the `Store` method is not reset on server rebuilds.
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To create a locally scoped scratch pad that is not attached to a `Page` object, use the [`newScratch`] function.
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[`Scratch`]: /methods/page/scratch/
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[`newScratch`]: /functions/collections/newscratch/
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[scratch pad]: /getting-started/glossary/#scratch-pad
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## Methods
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###### Set
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Sets the value of a given key.
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```go-html-template
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{{ .Store.Set "greeting" "Hello" }}
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```
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###### Get
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Gets the value of a given key.
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```go-html-template
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{{ .Store.Set "greeting" "Hello" }}
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{{ .Store.Get "greeting" }} → Hello
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```
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###### Add
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Adds a given value to existing value(s) of the given key.
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For single values, `Add` accepts values that support Go's `+` operator. If the first `Add` for a key is an array or slice, the following adds will be appended to that list.
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```go-html-template
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{{ .Store.Set "greeting" "Hello" }}
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{{ .Store.Add "greeting" "Welcome" }}
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{{ .Store.Get "greeting" }} → HelloWelcome
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```
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```go-html-template
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{{ .Store.Set "total" 3 }}
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{{ .Store.Add "total" 7 }}
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{{ .Store.Get "total" }} → 10
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```
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```go-html-template
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{{ .Store.Set "greetings" (slice "Hello") }}
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{{ .Store.Add "greetings" (slice "Welcome" "Cheers") }}
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{{ .Store.Get "greetings" }} → [Hello Welcome Cheers]
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```
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###### SetInMap
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Takes a `key`, `mapKey` and `value` and adds a map of `mapKey` and `value` to the given `key`.
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```go-html-template
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{{ .Store.SetInMap "greetings" "english" "Hello" }}
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{{ .Store.SetInMap "greetings" "french" "Bonjour" }}
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{{ .Store.Get "greetings" }} → map[english:Hello french:Bonjour]
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```
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###### DeleteInMap
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Takes a `key` and `mapKey` and removes the map of `mapKey` from the given `key`.
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```go-html-template
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{{ .Store.SetInMap "greetings" "english" "Hello" }}
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{{ .Store.SetInMap "greetings" "french" "Bonjour" }}
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{{ .Store.DeleteInMap "greetings" "english" }}
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{{ .Store.Get "greetings" }} → map[french:Bonjour]
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```
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###### GetSortedMapValues
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Returns an array of values from `key` sorted by `mapKey`.
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```go-html-template
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{{ .Store.SetInMap "greetings" "english" "Hello" }}
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{{ .Store.SetInMap "greetings" "french" "Bonjour" }}
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{{ .Store.GetSortedMapValues "greetings" }} → [Hello Bonjour]
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```
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###### Delete
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Removes the given key.
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```go-html-template
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{{ .Store.Set "greeting" "Hello" }}
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{{ .Store.Delete "greeting" }}
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```
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## Determinate values
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The `Store` method is often used to set scratch pad values within a shortcode, a partial template called by a shortcode, or by a Markdown render hook. In all three cases, the scratch pad values are not determinate until Hugo renders the page content.
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If you need to access a scratch pad value from a parent template, and the parent template has not yet rendered the page content, you can trigger content rendering by assigning the returned value to a [noop] variable:
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[noop]: /getting-started/glossary/#noop
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```go-html-template
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{{ $noop := .Content }}
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{{ .Store.Get "mykey" }}
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```
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You can also trigger content rendering with the `FuzzyWordCount`, `Len`, `Plain`, `PlainWords`, `ReadingTime`, `Summary`, `Truncated`, and `WordCount` methods. For example:
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```go-html-template
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{{ $noop := .WordCount }}
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{{ .Store.Get "mykey" }}
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```
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