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opt / imunify360 / venv / lib / python3.11 / site-packages / peewee_migrate /

?? ..
?? __init__.py(146 B)
?? __main__.py(78 B)
?? __pycache__
?? auto.py(11.85 KB)
?? cli.py(6.61 KB)
?? logs.py(146 B)
?? migrator.py(18.41 KB)
?? models.py(466 B)
?? py.typed(0 B)
?? router.py(12.21 KB)
?? template.py(1.78 KB)
?? types.py(249 B)
?? utils.py(325 B)

Editing: auto.py

"""Automatically create migrations."""
from __future__ import annotations

from typing import (
    TYPE_CHECKING,
    Any,
    Callable,
    Dict,
    Final,
    Iterable,
    List,
    Optional,
    Type,
    Union,
    cast,
)

import peewee as pw
from playhouse.reflection import Column as VanilaColumn

if TYPE_CHECKING:
    from .migrator import Migrator
    from .types import TModelType, TParams

INDENT: Final = "    "
NEWLINE: Final = "\n" + INDENT
FIELD_MODULES_MAP: Final = {
    "ArrayField": "pw_pext",
    "BinaryJSONField": "pw_pext",
    "DateTimeTZField": "pw_pext",
    "HStoreField": "pw_pext",
    "IntervalField": "pw_pext",
    "JSONField": "pw_pext",
    "TSVectorField": "pw_pext",
}
PW_MODULES: Final = "playhouse.postgres_ext", "playhouse.fields", "peewee"

def fk_to_params(field: pw.ForeignKeyField) -> TParams:
    """Get params from the given fk."""
    params = {}
    if field.on_delete is not None:
        params["on_delete"] = f"'{field.on_delete}'"

if field.on_update is not None:
        params["on_update"] = f"'{field.on_update}'"

return params

def dtf_to_params(field: pw.DateTimeField) -> TParams:
    """Get params from the given datetime field."""
    params = {}
    if not isinstance(field.formats, list):
        params["formats"] = field.formats

return params

FIELD_TO_PARAMS: Dict[Type[pw.Field], Callable[[Any], TParams]] = {
    pw.CharField: lambda f: {"max_length": f.max_length},
    pw.DecimalField: lambda f: {
        "auto_round": f.auto_round,
        "decimal_places": f.decimal_places,
        "max_digits": f.max_digits,
        "rounding": f.rounding,
    },
    pw.ForeignKeyField: fk_to_params,
    pw.DateTimeField: dtf_to_params,
}

class Column(VanilaColumn):
    """Get field's migration parameters."""

field_class: Type[pw.Field]

def __init__(self, field: pw.Field, **kwargs):
        super(Column, self).__init__(
            field.name,
            find_field_type(field),
            field.field_type,
            field.null,
            primary_key=field.primary_key,
            column_name=field.column_name,
            index=field.index,
            unique=field.unique,
            **kwargs,
        )
        self.field = field

if self.field_class in FIELD_TO_PARAMS:
            if self.extra_parameters is None:  # type: ignore[has-type]
                self.extra_parameters = {}

self.extra_parameters.update(FIELD_TO_PARAMS[self.field_class](field))

self.rel_model = None
        self.to_field = None

if isinstance(field, pw.ForeignKeyField):
            self.to_field = field.rel_field.name
            self.rel_model = (
                "'self'"
                if field.rel_model == field.model
                else "migrator.orm['%s']" % field.rel_model._meta.table_name
            )

def get_field(self, space: str = " ") -> str:
        """Generate the field definition for this column."""
        field = super(Column, self).get_field()
        module = FIELD_MODULES_MAP.get(self.field_class.__name__, "pw")
        name, _, field = [s and s.strip() for s in field.partition("=")]
        return "{name}{space}={space}{module}.{field}".format(
            name=name, field=field, space=space, module=module
        )

def get_field_parameters(self, *, change=False) -> TParams:
        """Generate parameters for self field."""
        params = super(Column, self).get_field_parameters()
        params.pop("backref", None)
        if change:
            params["unique"] = bool(params.pop("unique", False))
            params["index"] = bool(params.pop("index", False)) or params["unique"]
            params.pop("on_delete", None)
            params.pop("on_update", None)
            params["null"] = self.nullable

if self.field.default is not None and not callable(self.field.default):
            params["default"] = repr(self.field.db_value(self.field.default))

return params

def diff_one(model1: TModelType, model2: TModelType, **kwargs) -> List[str]:  # noqa: C901
    """Find difference between given peewee models."""
    changes = []

meta1, meta2 = model1._meta, model2._meta  # type: ignore[]
    field_names1 = meta1.fields
    field_names2 = meta2.fields

# Add fields
    names1 = set(field_names1) - set(field_names2)
    if names1:
        fields = [field_names1[name] for name in names1]
        changes.append(create_fields(model1, *fields, **kwargs))

# Drop fields
    names2 = set(field_names2) - set(field_names1)
    if names2:
        changes.append(drop_fields(model1, *names2))

# Change fields
    fields_to_change = []
    fields_nulls = []
    fields_indexes = []
    for name in set(field_names1) - names1 - names2:
        field1, field2 = field_names1[name], field_names2[name]
        diff = compare_fields(field1, field2)
        null = diff.pop("null", None)
        index = diff.pop("index", None)
        unique = diff.pop("unique", None)

if diff:
            fields_to_change.append((field1, diff))

if null is not None:
            fields_nulls.append((name, null))

if (index is not None) or (unique is not None):
            fields_indexes.append((name, index, unique))

if fields_to_change:
        changes.append(change_fields(model1, *fields_to_change))

for name, null in fields_nulls:
        changes.append(change_not_null(model1, name, null=null))

for name, index, unique in fields_indexes:
        if (index is True) or (unique is True):
            if field_names2[name].unique or field_names2[name].index:
                changes.append(drop_index(model1, name))
            changes.append(add_index(model1, name, unique=unique))
        else:
            changes.append(drop_index(model1, name))

# Check additional compound indexes
    indexes1 = meta1.indexes
    indexes2 = meta2.indexes

# Drop compound indexes
    indexes_to_drop = set(indexes2) - set(indexes1)
    changes.extend(
        drop_index(model1, name=index[0])
        for index in indexes_to_drop
        if isinstance(index[0], (list, tuple)) and len(index[0]) > 1
    )

# Add compound indexes
    indexes_to_add = set(indexes1) - set(indexes2)
    changes.extend(
        add_index(model1, name=index[0], unique=index[1])
        for index in indexes_to_add
        if isinstance(index[0], (list, tuple)) and len(index[0]) > 1
    )

return changes

def diff_many(
    models1: List[TModelType],
    models2: List[TModelType],
    migrator: Optional[Migrator] = None,
    *,
    reverse=False,
) -> List[str]:
    """Calculate changes for migrations from models2 to models1."""
    models1 = cast(List["TModelType"], pw.sort_models(models1))  # type: ignore[]
    models2 = cast(List["TModelType"], pw.sort_models(models2))  # type: ignore[]

if reverse:
        models1 = list(reversed(models1))
        models2 = list(reversed(models2))

models_map1 = {cast(str, m._meta.table_name): m for m in models1}  # type: ignore[]
    models_map2 = {cast(str, m._meta.table_name): m for m in models2}  # type: ignore[]

changes: List[str] = []

for name, model1 in models_map1.items():
        if name not in models_map2:
            continue
        changes.extend(diff_one(model1, models_map2[name], migrator=migrator))

# Add models
    changes.extend(
        create_model(models_map1[name], migrator=migrator)
        for name in [m for m in models_map1 if m not in models_map2]
    )

# Remove models
    changes.extend(
        remove_model(models_map2[name]) for name in [m for m in models_map2 if m not in models_map1]
    )

return changes

def model_to_code(model_type: TModelType, **kwargs) -> str:
    """Generate migrations for the given model."""
    template = "class {classname}(pw.Model):\n{fields}\n\n{meta}"
    meta = model_type._meta  # type: ignore[]
    fields = INDENT + NEWLINE.join(
        [
            field_to_code(field, **kwargs)
            for field in meta.sorted_fields
            if not (isinstance(field, pw.PrimaryKeyField) and field.name == "id")
        ]
    )
    meta = INDENT + NEWLINE.join(
        filter(
            None,
            [
                "class Meta:",
                f'{INDENT}table_name = "{meta.table_name}"',
                f'{INDENT}schema = "{meta.schema}"' if meta.schema else "",
                (
                    f"{INDENT}primary_key = pw.CompositeKey{meta.primary_key.field_names!r}"
                    if isinstance(meta.primary_key, pw.CompositeKey)
                    else ""
                ),
                f"{INDENT}indexes = {meta.indexes!r}" if meta.indexes else "",
            ],
        )
    )

return template.format(classname=model_type.__name__, fields=fields, meta=meta)

def create_model(model_type: TModelType, **kwargs) -> str:
    """Generate migrations to create model."""
    return "@migrator.create_model\n" + model_to_code(model_type, **kwargs)

def remove_model(model_type: TModelType, **kwargs) -> str:
    """Generate migrations to remove model."""
    meta = model_type._meta  # type: ignore[]
    return "migrator.remove_model('%s')" % meta.table_name

def create_fields(model_type: TModelType, *fields: pw.Field, **kwargs) -> str:
    """Generate migrations to add fields."""
    meta = model_type._meta  # type: ignore[]
    return "migrator.add_fields(%s'%s', %s)" % (
        NEWLINE,
        meta.table_name,
        NEWLINE
        + ("," + NEWLINE).join([field_to_code(field, space=False, **kwargs) for field in fields]),
    )

def drop_fields(model_type: TModelType, *fields: pw.Field, **kwargs) -> str:
    """Generate migrations to remove fields."""
    meta = model_type._meta  # type: ignore[]
    return "migrator.remove_fields('%s', %s)" % (
        meta.table_name,
        ", ".join(map(repr, fields)),
    )

def field_to_code(field: pw.Field, *, space: bool = True, **kwargs) -> str:
    """Generate field description."""
    col = Column(field)
    return col.get_field(" " if space else "")

def compare_fields(field1: pw.Field, field2: pw.Field) -> Dict:
    """Find diffs between the given fields."""
    ftype1, ftype2 = find_field_type(field1), find_field_type(field2)
    if ftype1 != ftype2:
        return {"type": True}

col1, col2 = (
        Column(field1, extra_parameters={"index": field1.index, "unique": field1.unique}),
        Column(field2, extra_parameters={"index": field2.index, "unique": field2.unique}),
    )
    params1, params2 = (
        col1.get_field_parameters(change=True),
        col2.get_field_parameters(change=True),
    )
    return dict(set(params1.items()) - set(params2.items()))

def change_fields(model_cls: TModelType, *fields: pw.Tuple[pw.Field, Dict]) -> str:
    """Generate migrations to change fields."""
    meta = model_cls._meta  # type: ignore[]
    return "migrator.change_fields('%s', %s)" % (
        meta.table_name,
        ("," + NEWLINE).join([field_to_code(f, space=False) for f, diff in fields]),
    )

def change_not_null(model_type: TModelType, name: str, *, null: bool) -> str:
    """Generate migrations."""
    meta = model_type._meta  # type: ignore[]
    operation = "drop_not_null" if null else "add_not_null"
    return "migrator.%s('%s', %s)" % (operation, meta.table_name, repr(name))

def add_index(model_type: TModelType, name: Union[str, Iterable[str]], *, unique: bool) -> str:
    """Generate migrations."""
    meta = model_type._meta  # type: ignore[]
    columns = repr(name).strip("()[]")
    return f"migrator.add_index('{meta.table_name}', {columns}, unique={unique})"

def drop_index(model_type: TModelType, name: Union[str, Iterable[str]]) -> str:
    """Generate migrations."""
    meta = model_type._meta  # type: ignore[]
    columns = repr(name).strip("()[]")
    return f"migrator.drop_index('{meta.table_name}', {columns})"

def find_field_type(field: pw.Field) -> Type[pw.Field]:
    ftype = type(field)
    if ftype.__module__ not in PW_MODULES:
        for cls in ftype.mro():
            if cls.__module__ in PW_MODULES:
                return cls

return ftype

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