Prefect Docs

# GraphQL

# EnumValue

class

prefect.utilities.graphql.EnumValue

(value)[source]

When parsing GraphQL arguments, strings can be wrapped in this class to be rendered as enum values, without quotation marks.

Args:

  • value (str): the value that should be represented as an enum value


# Functions

top-level functions:                                                                                                                                                       

prefect.utilities.graphql.parse_graphql

(document)[source]

Parses a document into a GraphQL-compliant query string.

Documents can be a mix of strings, dicts, lists (or other sequences), and GQLObjects.

The parser attempts to maintain the form of the Python objects in the resulting GQL query.

For example: 

query = parse_graphql({
    'query': {
        'books(published: {gt: 1990})': {
            'title'
        },
        'authors': [
            'name',
            'books': {
                'title'
            }]
        }
    }
})

results in: 
query {
    books(published: {gt: 1990}) {
        title
    }
    authors {
        name
        books {
            title
        }
    }
}



For convenience, if a dictionary key is either True or Ellipsis(...), it is ignored and the key alone is used as a field name.


{'query':{
    'books': {
        'id': True,
        'name': ...,
        'author': {
            'id',
            'name',
        }
    }
}}



is equivalent to:


{'query':{
    'books': [
        'id',
        'name',
        {'author': {
            'id',
            'name',
        }}
    ]
}}



Args:
  • document (Any): A collection of Python objects complying with the general shape of a GraphQL query. Generally, this will consist of (at least) a dictionary, but also sequences and GQLObjects.
Returns:
  • str: a GraphQL query compiled from the provided Python structures.
Raises:
  • TypeError: if the user provided a GQLObject class, rather than an instance.

prefect.utilities.graphql.parse_graphql_arguments

(arguments)[source]

Parses a dictionary of GraphQL arguments, returning a GraphQL-compliant string representation. If a string is passed, it is returned without modification.

This parser makes a few adjustments to the dictionary's usual string representation: - ' around keys are removed - spaces added around curly braces - leading and lagging braces are removed - True becomes true, False becomes false, and None becomes null

Args:

  • arguments (Any): an object (usually a dictionary) representing the GraphQL arguments
Returns:
  • str: a string representing the parsed GraphQL arguments

prefect.utilities.graphql.with_args

(field, arguments)[source]

Given Python objects representing a field name and arguments, formats them as a single GraphQL compatible string.

Example:


query = parse_graphql({
    'query': {
        with_args("task", {"where": {"id": 3}}): {
            "id"
        }
    }
})

assert query == '''
    query {
        task(where: {id: 3}) {
            id
        }
    }
    '''



Args:
  • field (Any): the GraphQL field that will be supplied with arguments
  • arguments (Any): the arguments to be parsed and supplied to the field
Returns:
  • str: the parsed field and arguments

prefect.utilities.graphql.compress

(input)[source]

Convenience function for compressing something before sending it to Cloud. Converts to string, encodes, compresses, encodes again using b64, and decodes.

Args:

  • input (Any): the dictionary to be compressed
Returns:
  • str: The string resulting from the compression

prefect.utilities.graphql.decompress

(string)[source]

Convenience function for decompressing a string that's been compressed. Base64 decodes the string, decodes it, decompresses it, and loads.

Args:

  • string (str): the string to decompress
Returns:
  • Any: The object resulting from the decompression

This documentation was auto-generated from commit n/a
on July 1, 2021 at 18:35 UTC

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