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import { PgRollOperation } from '@xata.io/pgroll'; | ||
import { PartialDeep } from 'type-fest'; | ||
import { Schemas } from '@xata.io/client'; | ||
import { generateLinkReference, tableNameFromLinkComment, xataColumnTypeToPgRoll } from '../migrations/pgroll.js'; | ||
|
||
export function compareSchemas( | ||
source: PartialDeep<Schemas.BranchSchema>, | ||
target: PartialDeep<Schemas.BranchSchema> | ||
): { edits: PgRollOperation[] } { | ||
const edits: PgRollOperation[] = []; | ||
|
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// Compare tables | ||
const sourceTables = Object.keys(source.tables ?? {}); | ||
const targetTables = Object.keys(target.tables ?? {}); | ||
const newTables = targetTables.filter((table) => !sourceTables.includes(table)); | ||
const deletedTables = sourceTables.filter((table) => !targetTables.includes(table)); | ||
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// Compare columns | ||
for (const table of sourceTables) { | ||
const sourceColumns = Object.keys(source.tables?.[table]?.columns ?? {}); | ||
const targetColumns = Object.keys(target.tables?.[table]?.columns ?? {}); | ||
const newColumns = targetColumns.filter((column) => !sourceColumns.includes(column)); | ||
const deletedColumns = sourceColumns.filter((column) => !targetColumns.includes(column)); | ||
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// Add columns | ||
for (const column of newColumns) { | ||
const props = target.tables?.[table]?.columns?.[column] ?? {}; | ||
edits.push({ | ||
add_column: { | ||
table, | ||
column: { | ||
name: column, | ||
type: xataColumnTypeToPgRoll(props?.type as any), | ||
comment: props?.comment, | ||
nullable: !(props?.nullable === false), | ||
unique: props?.unique, | ||
default: props?.default ?? undefined, | ||
references: | ||
props?.type === 'link' && props?.name | ||
? generateLinkReference({ | ||
column: props.name, | ||
table: tableNameFromLinkComment(props?.comment ?? '') ?? '' | ||
}) | ||
: undefined | ||
} | ||
} | ||
}); | ||
} | ||
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// Delete columns | ||
for (const column of deletedColumns) { | ||
edits.push({ drop_column: { table, column } }); | ||
} | ||
|
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// Compare column properties | ||
for (const column of targetColumns) { | ||
const sourceProps = source.tables?.[table]?.columns?.[column] ?? {}; | ||
const targetProps = target.tables?.[table]?.columns?.[column] ?? {}; | ||
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if (sourceProps.type !== targetProps.type) { | ||
edits.push({ | ||
alter_column: { | ||
table, | ||
column, | ||
type: targetProps.type, | ||
references: | ||
targetProps?.type === 'link' && targetProps?.name | ||
? generateLinkReference({ | ||
column: targetProps.name, | ||
table: tableNameFromLinkComment(targetProps?.comment ?? '') ?? '' | ||
}) | ||
: undefined | ||
} | ||
}); | ||
} | ||
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if (sourceProps.nullable !== targetProps.nullable) { | ||
edits.push({ alter_column: { table, column, nullable: targetProps.nullable } }); | ||
} | ||
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if (sourceProps.unique !== targetProps.unique) { | ||
edits.push({ | ||
alter_column: { | ||
table, | ||
column, | ||
unique: { | ||
name: `${table}_${column}_unique` | ||
} | ||
} | ||
}); | ||
} | ||
} | ||
} | ||
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// Delete tables | ||
for (const table of deletedTables) { | ||
edits.push({ drop_table: { name: table } }); | ||
} | ||
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// Add new tables | ||
for (const table of newTables) { | ||
const props = target.tables?.[table] ?? {}; | ||
edits.push({ | ||
create_table: { | ||
name: table, | ||
comment: props.comment, | ||
columns: Object.entries(props.columns ?? {}).map(([name, column]) => { | ||
return { | ||
name, | ||
type: xataColumnTypeToPgRoll(column?.type as any), | ||
comment: column?.comment, | ||
nullable: !(column?.nullable === false), | ||
unique: column?.unique, | ||
default: column?.default ?? undefined, | ||
references: | ||
column?.type === 'link' && column?.name | ||
? generateLinkReference({ | ||
column: column?.name, | ||
table: tableNameFromLinkComment(column?.comment ?? '') ?? '' | ||
}) | ||
: undefined | ||
}; | ||
}) | ||
} | ||
}); | ||
} | ||
|
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return { edits }; | ||
} |
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