Character filters in Elasticsearch - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a character filter that replaces '&' with 'and'.

Elasticsearch

{
  "settings": {
    "analysis": {
      "char_filter": {
        "ampersand_filter": {
          "type": "[1]",
          "mappings": ["&=>and"]
        }
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

Ahtml_strip

Breplace

Cpattern_replace

Dmapping

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'replace' or 'pattern_replace' which are not valid character filter types.

Confusing character filters with token filters.

The mapping type is used to replace characters or strings with others in character filters.

2fill in blank

medium

Complete the code to define a character filter that removes HTML tags.

Elasticsearch

{
  "settings": {
    "analysis": {
      "char_filter": {
        "html_remover": {
          "type": "[1]"
        }
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

Amapping

Bhtml_strip

Cpattern_replace

Dkeyword_marker

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'mapping' type which requires explicit mappings.

Confusing with token filters like 'keyword_marker'.

The html_strip character filter removes HTML tags from text.

3fill in blank

hard

Fix the error in the character filter definition to replace '#' with 'number'.

Elasticsearch

{
  "settings": {
    "analysis": {
      "char_filter": {
        "hash_filter": {
          "type": "[1]",
          "mappings": ["#=>number"]
        }
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

Apattern_replace

Bhtml_strip

Cmapping

Dreplace

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'pattern_replace' which requires a regex pattern.

Using 'html_strip' which removes HTML tags.

The correct type for character replacement using mappings is mapping.

4fill in blank

hard

Fill both blanks to create a character filter that replaces '@' with 'at' and removes HTML tags.

Elasticsearch

{
  "settings": {
    "analysis": {
      "char_filter": {
        "email_filter": {
          "type": "[1]",
          "mappings": ["@=>at"]
        },
        "clean_html": {
          "type": "[2]"
        }
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

Amapping

Bhtml_strip

Cpattern_replace

Dkeyword_marker

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the types for each filter.

Using 'pattern_replace' instead of 'mapping' for simple replacements.

The mapping type is used for character replacements with mappings, and html_strip removes HTML tags.

5fill in blank

hard

Fill all three blanks to define a character filter that replaces '$' with 'dollar', removes HTML tags, and replaces '%' with 'percent'.

Elasticsearch

{
  "settings": {
    "analysis": {
      "char_filter": {
        "dollar_filter": {
          "type": "[1]",
          "mappings": ["$=>dollar"]
        },
        "html_cleaner": {
          "type": "[2]"
        },
        "percent_filter": {
          "type": "[3]",
          "mappings": ["%=>percent"]
        }
      }
    }
  }
}

Drag options to blanks, or click blank then click option'

Amapping

Bhtml_strip

Cpattern_replace

Dkeyword_marker

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'pattern_replace' instead of 'mapping' for simple character replacements.

Confusing the types for each filter.

The mapping type is used for character replacements with mappings, and html_strip removes HTML tags.