/*
  Warnings:

  - You are about to drop the `_PostToTag` table. If the table is not empty, all the data it contains will be lost.
  - Added the required column `sourceId` to the `Post` table without a default value. This is not possible if the table is not empty.

*/
-- DropForeignKey
ALTER TABLE `_PostToTag` DROP FOREIGN KEY `_PostToTag_ibfk_1`;

-- DropForeignKey
ALTER TABLE `_PostToTag` DROP FOREIGN KEY `_PostToTag_ibfk_2`;

-- AlterTable
ALTER TABLE `Post` ADD COLUMN `sourceId` INTEGER NOT NULL;

-- DropTable
DROP TABLE `_PostToTag`;

-- CreateTable
CREATE TABLE `TagsOnPosts` (
    `tagId` INTEGER NOT NULL,
    `postId` INTEGER NOT NULL,

    PRIMARY KEY (`postId`, `tagId`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- CreateTable
CREATE TABLE `_CohortToSource` (
    `A` INTEGER NOT NULL,
    `B` INTEGER NOT NULL,

    UNIQUE INDEX `_CohortToSource_AB_unique`(`A`, `B`),
    INDEX `_CohortToSource_B_index`(`B`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- AddForeignKey
ALTER TABLE `Post` ADD CONSTRAINT `Post_sourceId_fkey` FOREIGN KEY (`sourceId`) REFERENCES `Source`(`id`) ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE `TagsOnPosts` ADD CONSTRAINT `TagsOnPosts_postId_fkey` FOREIGN KEY (`postId`) REFERENCES `Post`(`id`) ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE `TagsOnPosts` ADD CONSTRAINT `TagsOnPosts_tagId_fkey` FOREIGN KEY (`tagId`) REFERENCES `Tag`(`id`) ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE `_CohortToSource` ADD FOREIGN KEY (`A`) REFERENCES `Cohort`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE `_CohortToSource` ADD FOREIGN KEY (`B`) REFERENCES `Source`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;