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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 | 9x 9x 9x 9x 9x 441x 441x 13x 81x 5x 8x 620x 620x 968x 620x 37x 37x 443x 37x 443x 443x 443x 443x 443x 3x 3x 3x 1x 2x 2x 2x 2x 11x 11x 11x 83x 4x 4x 4x 4x 3x 1x 7x 7x 7x 7x 9x | import { forIn, mapValues } from "lodash"; import * as uuid from "uuid"; import neo4js, { ModelInstance, Relation, BaseProps, RelationType, } from "./index"; import { CharGenerator, prepareWhere, prepareSet } from "./utils"; export class Model<P, M extends ModelInstance<P>> { public label: String; relations: Relation[]; modelInstanceClass: new (props: P) => M; protected beforeCreate(props: P): P { return props; } protected afterCreate(instance: M): M { return instance; } protected beforeFind(props?: P & BaseProps): (P & BaseProps) | null { return props; } protected afterFind(instance: M): M { return instance; } protected beforeUpdate( props: P & BaseProps, newProps: P ): { props: P & BaseProps; newProps: P } { return { props, newProps }; } protected afterUpdate(instance: M): M { return instance; } protected _createModelInstance(props: P & BaseProps): M { let instance: any = this.modelInstanceClass ? new this.modelInstanceClass(props) : new ModelInstance(props); this.relations.forEach( r => (instance = r.addFunctionsToInstance(instance)) ); return instance; } constructor(label: string) { this.label = label; this.relations = []; } public async create(props: P): Promise<M> { let defaultProps = mapValues( this.modelInstanceClass ? this.modelInstanceClass.prototype._defaultProps : {}, prop => (typeof prop === "function" ? prop() : prop) ); let p: P & BaseProps = this.beforeCreate({ guid: uuid.v4(), ...defaultProps, ...(props as any), } as P); p = { ...(p as any) } as P & BaseProps; const result = await neo4js.run( ` CREATE (n:${this.label} {p}) RETURN n `, { p } ); Iif (!result || result.length !== 1) { throw new Error( `Create didn't work, cmd: "CREATE (n:${ this.label } {p}) RETURN n" with params: ${JSON.stringify({ p })}` ); } return this.afterCreate(this._createModelInstance(result[0].n)); } public async findByGuid(guid: string): Promise<M | null> { const result = await neo4js.run( ` MATCH (n:${this.label} {guid:{guid}}) RETURN n `, { guid } ); Iif (!result || result.length > 1) { throw new Error( `Match didn't work, cmd: "MATCH (n:${ this.label } {guid:{guid}}) RETURN n" with params: ${JSON.stringify({ guid, })}` ); } if (result.length === 0) { return null; } return this._createModelInstance(result[0].n); } public async delete( props: P & BaseProps, detach: boolean = false ): Promise<number> { const { where, flatProps } = prepareWhere(props, "n"); const result = await neo4js.run( ` MATCH (n:${this.label}) ${where} ${detach ? " DETACH " : ""} DELETE n `, flatProps ); return result._stats.nodesDeleted; } public async find(props?: P & BaseProps): Promise<M[]> { const p = this.beforeFind(props); const { where, flatProps } = prepareWhere(p, "n"); let result = await neo4js.run( ` MATCH (n:${this.label}) ${where} RETURN n `, flatProps ); return result.map(p => this.afterFind(this._createModelInstance(p.n))); } public async findOne(props?: P & BaseProps): Promise<M | null> { const p = this.beforeFind(props); const { where, flatProps } = prepareWhere(p, "n"); let result = await neo4js.run( ` MATCH (n:${this.label}) ${where} RETURN n `, flatProps ); if (result.length) { return this.afterFind(this._createModelInstance(result[0].n)); } return Promise.resolve(null); } public async update(props: P & BaseProps, newProps: P): Promise<M[]> { const params = this.beforeUpdate(props, newProps); const { where, flatProps } = prepareWhere(params.props, "n"); const { str: setPropsStr, newProps: _newProps } = prepareSet( params.newProps, "n" ); let result = await neo4js.run( ` MATCH (n:${this.label}) ${where} SET ${setPropsStr} RETURN n `, { ...flatProps, ..._newProps } ); return result.map(p => this.afterUpdate(this._createModelInstance(p.n))); } } |