多维表格
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import type { ColumnType, LinkToAnotherRecordType, TableType } from 'nocodb-sdk'
import { UITypes } from 'nocodb-sdk'
import dagre from 'dagre'
import type { Edge, Elements } from '@vue-flow/core'
import type { MaybeRef } from '@vueuse/core'
import { Position, isEdge, isNode } from '@vue-flow/core'
import { computed, ref, unref, useMetas } from '#imports'
export interface ErdFlowConfig {
showPkAndFk: boolean
showViews: boolean
showAllColumns: boolean
singleTableMode: boolean
showJunctionTableNames: boolean
}
export function useErdElements(tables: MaybeRef<TableType[]>, props: MaybeRef<ErdFlowConfig>) {
const elements = ref<Elements>([])
const dagreGraph = new dagre.graphlib.Graph()
dagreGraph.setDefaultEdgeLabel(() => ({}))
dagreGraph.setGraph({ rankdir: 'LR' })
const { metasWithIdAsKey } = useMetas()
const erdTables = computed(() => unref(tables))
const config = $computed(() => unref(props))
const ltarColumns = computed(() =>
erdTables.value.reduce((acc, table) => {
const meta = metasWithIdAsKey.value[table.id!]
const columns = meta.columns?.filter(
(column: ColumnType) => column.uidt === UITypes.LinkToAnotherRecord && column.system !== 1,
)
columns?.forEach((column: ColumnType) => {
const colOptions = column.colOptions as LinkToAnotherRecordType
if (colOptions.type === 'hm') {
return acc.push(column)
}
if (colOptions.type === 'mm') {
// Avoid duplicate mm connections
const correspondingColumn = acc.find((c) => {
const correspondingColOptions = c.colOptions as LinkToAnotherRecordType
return (
correspondingColOptions.type === 'mm' &&
correspondingColOptions.fk_parent_column_id === colOptions.fk_child_column_id &&
correspondingColOptions.fk_child_column_id === colOptions.fk_parent_column_id
)
})
if (!correspondingColumn) {
return acc.push(column)
}
}
})
return acc
}, [] as ColumnType[]),
)
const edgeMMTableLabel = (modelId: string) => {
const mmModel = metasWithIdAsKey.value[modelId]
if (mmModel.title !== mmModel.table_name) {
return `${mmModel.title} (${mmModel.table_name})`
}
return mmModel.title
}
function createNodes() {
return erdTables.value.flatMap((table) => {
if (!table.id) return []
const columns =
metasWithIdAsKey.value[table.id].columns?.filter(
(col) => config.showAllColumns || (!config.showAllColumns && col.uidt === UITypes.LinkToAnotherRecord),
) || []
return [
{
id: table.id,
data: {
...metasWithIdAsKey.value[table.id],
showPkAndFk: config.showPkAndFk,
showAllColumns: config.showAllColumns,
columnLength: columns.length,
},
type: 'custom',
position: { x: 0, y: 0 },
},
]
})
}
function createEdges() {
return ltarColumns.value.reduce<Edge[]>((acc, column) => {
const source = column.fk_model_id!
const target = (column.colOptions as LinkToAnotherRecordType).fk_related_model_id!
const hasSource = erdTables.value.find((table) => table.id === source)
const hasTarget = erdTables.value.find((table) => table.id === target)
if (!hasSource || !hasTarget) return acc
let sourceColumnId, targetColumnId
let edgeLabel = ''
if ((column.colOptions as LinkToAnotherRecordType).type === 'hm') {
sourceColumnId = (column.colOptions as LinkToAnotherRecordType).fk_child_column_id
targetColumnId = (column.colOptions as LinkToAnotherRecordType).fk_child_column_id
}
if ((column.colOptions as LinkToAnotherRecordType).type === 'mm') {
sourceColumnId = (column.colOptions as LinkToAnotherRecordType).fk_parent_column_id
targetColumnId = (column.colOptions as LinkToAnotherRecordType).fk_child_column_id
edgeLabel = config.showJunctionTableNames
? edgeMMTableLabel((column.colOptions as LinkToAnotherRecordType).fk_mm_model_id!)
: ''
}
if (source !== target) dagreGraph.setEdge(source, target)
acc.push({
id: `e-${sourceColumnId}-${source}-${targetColumnId}-${target}-#${edgeLabel}`,
source: `${source}`,
target: `${target}`,
sourceHandle: `s-${sourceColumnId}-${source}`,
targetHandle: `d-${targetColumnId}-${target}`,
type: 'custom',
data: {
column,
isSelfRelation: source === target && sourceColumnId === targetColumnId,
label: edgeLabel,
},
})
return acc
}, [])
}
function connectNonConnectedNodes() {
const connectedNodes = new Set<string>()
elements.value.forEach((el) => {
if (isEdge(el)) {
connectedNodes.add(el.source)
connectedNodes.add(el.target)
}
})
const nonConnectedNodes = erdTables.value.filter((table) => !connectedNodes.has(table.id!))
if (nonConnectedNodes.length === 0) return
if (nonConnectedNodes.length === 1) {
const firstTable = erdTables.value.find((table) => table.type === 'table' && table.id !== nonConnectedNodes[0].id)
if (!firstTable) return
dagreGraph.setEdge(nonConnectedNodes[0].id!, firstTable.id!)
return
}
const firstNode = nonConnectedNodes[0]
nonConnectedNodes.forEach((node, index) => {
if (index === 0) return
const source = firstNode.id!
const target = node.id!
dagreGraph.setEdge(source, target)
})
}
const layout = () => {
elements.value = [...createNodes(), ...createEdges()]
if (!config.singleTableMode) connectNonConnectedNodes()
elements.value.forEach((el) => {
if (isNode(el)) {
dagreGraph.setNode(el.id, { width: 250, height: 50 * el.data.columnLength })
} else if (isEdge(el)) {
dagreGraph.setEdge(el.source, el.target)
}
})
dagre.layout(dagreGraph)
elements.value.forEach((el) => {
if (isNode(el)) {
const nodeWithPosition = dagreGraph.node(el.id)
el.targetPosition = Position.Left
el.sourcePosition = Position.Right
el.position = { x: nodeWithPosition.x, y: nodeWithPosition.y }
}
})
}
return {
elements,
layout,
}
}