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🏠 Root / opt / hc_python / lib / python3.12 / site-packages / alembic / testing /

✏️ Editing: schemacompare.py

from itertools import zip_longest

from sqlalchemy import schema
from sqlalchemy.sql.elements import ClauseList

class CompareTable:
    def __init__(self, table):
        self.table = table

def __eq__(self, other):
        if self.table.name != other.name or self.table.schema != other.schema:
            return False

for c1, c2 in zip_longest(self.table.c, other.c):
            if (c1 is None and c2 is not None) or (
                c2 is None and c1 is not None
            ):
                return False
            if CompareColumn(c1) != c2:
                return False

return True

# TODO: compare constraints, indexes

def __ne__(self, other):
        return not self.__eq__(other)

class CompareColumn:
    def __init__(self, column):
        self.column = column

def __eq__(self, other):
        return (
            self.column.name == other.name
            and self.column.nullable == other.nullable
        )
        # TODO: datatypes etc

def __ne__(self, other):
        return not self.__eq__(other)

class CompareIndex:
    def __init__(self, index, name_only=False):
        self.index = index
        self.name_only = name_only

def __eq__(self, other):
        if self.name_only:
            return self.index.name == other.name
        else:
            return (
                str(schema.CreateIndex(self.index))
                == str(schema.CreateIndex(other))
                and self.index.dialect_kwargs == other.dialect_kwargs
            )

def __ne__(self, other):
        return not self.__eq__(other)

def __repr__(self):
        expr = ClauseList(*self.index.expressions)
        try:
            expr_str = expr.compile().string
        except Exception:
            expr_str = str(expr)
        return f"<CompareIndex {self.index.name}({expr_str})>"

class CompareCheckConstraint:
    def __init__(self, constraint):
        self.constraint = constraint

def __eq__(self, other):
        return (
            isinstance(other, schema.CheckConstraint)
            and self.constraint.name == other.name
            and (str(self.constraint.sqltext) == str(other.sqltext))
            and (other.table.name == self.constraint.table.name)
            and other.table.schema == self.constraint.table.schema
        )

def __ne__(self, other):
        return not self.__eq__(other)

class CompareForeignKey:
    def __init__(self, constraint):
        self.constraint = constraint

def __eq__(self, other):
        r1 = (
            isinstance(other, schema.ForeignKeyConstraint)
            and self.constraint.name == other.name
            and (other.table.name == self.constraint.table.name)
            and other.table.schema == self.constraint.table.schema
        )
        if not r1:
            return False
        for c1, c2 in zip_longest(self.constraint.columns, other.columns):
            if (c1 is None and c2 is not None) or (
                c2 is None and c1 is not None
            ):
                return False
            if CompareColumn(c1) != c2:
                return False
        return True

def __ne__(self, other):
        return not self.__eq__(other)

class ComparePrimaryKey:
    def __init__(self, constraint):
        self.constraint = constraint

def __eq__(self, other):
        r1 = (
            isinstance(other, schema.PrimaryKeyConstraint)
            and self.constraint.name == other.name
            and (other.table.name == self.constraint.table.name)
            and other.table.schema == self.constraint.table.schema
        )
        if not r1:
            return False

for c1, c2 in zip_longest(self.constraint.columns, other.columns):
            if (c1 is None and c2 is not None) or (
                c2 is None and c1 is not None
            ):
                return False
            if CompareColumn(c1) != c2:
                return False

return True

def __ne__(self, other):
        return not self.__eq__(other)

class CompareUniqueConstraint:
    def __init__(self, constraint):
        self.constraint = constraint

def __eq__(self, other):
        r1 = (
            isinstance(other, schema.UniqueConstraint)
            and self.constraint.name == other.name
            and (other.table.name == self.constraint.table.name)
            and other.table.schema == self.constraint.table.schema
        )
        if not r1:
            return False

for c1, c2 in zip_longest(self.constraint.columns, other.columns):
            if (c1 is None and c2 is not None) or (
                c2 is None and c1 is not None
            ):
                return False
            if CompareColumn(c1) != c2:
                return False

return True

def __ne__(self, other):
        return not self.__eq__(other)