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Explain recursive common fragments edge case (#2183)

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peolic
2021-12-30 01:49:47 +02:00
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ui/v2.5/src/docs/en/ScraperDevelopment.md
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@@ -319,11 +319,25 @@ The `common` field is used to configure selector fragments that can be reference
common:
$infoPiece: //div[@class="infoPiece"]/span
performer:
Measurements: $infoPiece[text() = 'Measurements:']/../span[@class="smallInfo"]
Measurements: $infoPiece[text() = 'Measurements:']/../span[@class="smallInfo"]
```
The `Measurements` xpath string will replace `$infoPiece` with `//div[@class="infoPiece"]/span`, resulting in: `//div[@class="infoPiece"]/span[text() = 'Measurements:']/../span[@class="smallInfo"]`.
> **⚠️ Note:** Recursive common fragments are **not** supported.
Referencing a common fragment within another common fragment will cause an error. For example:
```yaml
common:
$info: //div[@class="info"]
# Referencing $info in $models will cause an error
$models: $info/a[@class="model"]
scene:
Title: $info/h1
Performers:
Name: $models
URL: $models/@href
```
### Post-processing options
Post-processing operations are contained in the `postProcess` key. Post-processing operations are performed in the order they are specified. The following post-processing operations are available: