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from typing import List, Optional |
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from pydantic import BaseModel, Field |
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from pymongo import ASCENDING, DESCENDING, TEXT, IndexModel |
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class Index(BaseModel): |
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name: Optional[str] = Field( |
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default=None, |
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description="Custom name to use for this index - if none is given, a name will be generated.", |
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) |
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fields: List[str] = Field( |
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min_items=1, |
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description=( |
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"Fields to index. Can be prefixed with '+' or '-' to specify index direction as ascending" |
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"or descending. Prefix with '$' to specify text index." |
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), |
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) |
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unique: Optional[bool] = Field(default=False, descrition="If True, creates a uniqueness constraint on the index.") |
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sparse: Optional[bool] = Field( |
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default=False, description="If True, omit from the index any documents that lack the indexed field." |
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) |
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background: Optional[bool] = Field( |
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default=False, description="If True, this index should be created in the background." |
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) |
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# Used to create an expiring (TTL) collection. |
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# MongoDB will automatically delete documents from this collection after <int> seconds. |
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# The indexed field must be a UTC datetime or the data will not expire. |
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expire_after_seconds: Optional[int] = Field( |
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description="Used to create an expiring (TTL) collection. Documents automatically deleted after <int> seconds." |
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) |
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def to_pymongo(self): |
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# Create pymongo index models |
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pymongo_fields = [] |
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for field in self.fields: |
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# Process prefix |
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direction = ASCENDING |
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if field.startswith("-"): |
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direction = DESCENDING |
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field = field[1:] |
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elif field.startswith("+"): |
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field = field[1:] |
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elif field.startswith("$"): |
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direction = TEXT |
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field = field[1:] |
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pymongo_fields.append((field, direction)) |
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return IndexModel( |
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pymongo_fields, |
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unique=self.unique, |
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background=self.background, |
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sparse=self.sparse, |
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expireAfterSeconds=self.expire_after_seconds, |
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) |
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RamiAwar /
Mongomantic
