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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 | 9x 9x 9x 9x 104x 104x 81x 44x 104x 5x 99x 9x 13x 13x 13x 13x 13x 13x 13x 9x 4x 4x 4x 4x 9x 80x 80x 80x 138x 138x 138x 80x 9x 1x 1x 1x 2x 2x 1x 9x 3x 3x 3x 3x 3x 9x 3x 3x 3x 3x 3x | import neo4js, { ModelInstance } from "./index";
import { prepareWhere, prepareSet } from "./utils";
import { keys } from "lodash";
import { RelationType } from "./Relation";
import { Neo4jResultStats } from "./Types";
const relationPropsKey = "relationProps";
function getRelationString(
label: string,
relationType: RelationType,
relationProps?: any
) {
let relationPropsStr = "";
if (relationProps) {
relationPropsStr = keys(relationProps)
.map(key => `${key}: {${relationPropsKey}}.${key}`)
.join(", ");
}
if (relationType.any) {
return `-[r:${label} {${relationPropsStr}}]-`;
}
return `${
!relationType.out && !relationType.any ? "<" : ""
}-[r:${label} {${relationPropsStr}}]-${
!relationType.out && !relationType.any ? "" : ">"
}`;
}
export async function get(
instance: ModelInstance<any>,
label: string,
relationType: RelationType,
props: any,
relationProps?: any
): Promise<any> {
const { where, flatProps } = prepareWhere({ b: props, r: relationProps }, [
"b",
"r",
]);
const relationString = getRelationString(label, relationType);
const result = await neo4js.run(
`
MATCH (a:${this.src.label} {guid:{_srcGuid}})${relationString}(b:${
this.dest.label
})
${where}
RETURN b, r
`,
{ _srcGuid: instance.props.guid, ...flatProps }
);
return Promise.resolve(
result.map(p => {
const instance = this.dest._createModelInstance(p.b);
instance.relationProps = p.r;
return instance;
})
);
}
export async function remove(
instance: ModelInstance<any>,
label: string,
relationType: RelationType,
props: any,
relationProps?: any
): Promise<Neo4jResultStats> {
const { where, flatProps } = prepareWhere({ b: props, r: relationProps }, [
"b",
"r",
]);
const relationString = getRelationString(label, relationType);
const result = await neo4js.run(
`
MATCH (a:${this.src.label} {guid:{_srcGuid}})${relationString}(b:${
this.dest.label
})
${where}
DELETE r
`,
{ _srcGuid: instance.props.guid, ...flatProps }
);
return Promise.resolve(result._stats);
}
export async function create(
instance: ModelInstance<any>,
label: string,
relationType: RelationType,
propsArray: any[],
relationProps?: any
): Promise<any> {
const destInstances = [];
const relationString = getRelationString(label, relationType, relationProps);
for (const props of propsArray) {
const destInstance = await this.dest.create(props);
destInstances.push(destInstance);
await neo4js.run(
`
MATCH
(a:${this.src.label} {guid:{srcGuid}}),
(b:${this.dest.label} {guid:{destGuid}})
MERGE (a)${relationString}(b)
`,
{
srcGuid: instance.props.guid,
destGuid: destInstance.props.guid,
relationProps,
}
);
}
return Promise.resolve(destInstances);
}
export async function add(
instance: ModelInstance<any>,
label: string,
relationType: RelationType,
instances: ModelInstance<any>[],
relationProps?: any
): Promise<number> {
const relationString = getRelationString(label, relationType, relationProps);
let relationshipsCreated = 0;
for (const destInstance of instances) {
const result = await neo4js.run(
`
MATCH
(a:${this.src.label} {guid:{srcGuid}}),
(b:${this.dest.label} {guid:{destGuid}})
MERGE (a)${relationString}(b)
`,
{
srcGuid: instance.props.guid,
destGuid: destInstance.props.guid,
relationProps,
}
);
relationshipsCreated += result._stats.relationshipsCreated;
}
return Promise.resolve(relationshipsCreated);
}
export async function count(
instance: ModelInstance<any>,
label: string,
relationType: RelationType,
props: any,
relationProps?: any
): Promise<number> {
const { where, flatProps } = prepareWhere({ b: props, r: relationProps }, [
"b",
"r",
]);
const relationString = getRelationString(label, relationType);
const result = await neo4js.run(
`
MATCH (a:${this.src.label} {guid:{_srcGuid}})${relationString}(b:${
this.dest.label
})
${where}
RETURN COUNT(b) as b
`,
{ _srcGuid: instance.props.guid, ...flatProps }
);
const low = result._raw.records[0]._fields[0].low || -1;
return Promise.resolve(low);
}
export async function update(
instance: ModelInstance<any>,
label: string,
relationType: RelationType,
props: any,
whereProps: any,
relationProps?: any,
whereRelationProps?: any
): Promise<any> {
const { where, flatProps } = prepareWhere(
{ b: whereProps, r: whereRelationProps },
["b", "r"]
);
const { str: setPropsStr, newProps } = prepareSet(
{
b: props,
r: relationProps,
},
["b", "r"]
);
const relationString = getRelationString(label, relationType);
const result = await neo4js.run(
`
MATCH (a:${this.src.label} {guid:{_srcGuid}})${relationString}(b:${
this.dest.label
})
${where}
SET ${setPropsStr}
RETURN b
`,
{ _srcGuid: instance.props.guid, ...flatProps, ...newProps }
);
return Promise.resolve(result.map(a => this.dest._createModelInstance(a.b)));
}
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